Free printable math worksheets
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All 428 ready-made worksheets are below — each one built from one of the 148 worksheet types, so it prints a fresh set of questions every time you ask. Or build one from scratch.
Nothing matches that. Try a skill (fractions), a number (÷7), or a grade (grade 3).
Visual foundations
Early Math worksheets
Children count visible objects, compare two values, take away pictures, complete number bonds, and fill gaps in number sequences.Counting 4 sheets
Addition 3 sheets
Written number practice
Arithmetic worksheets
Children solve written addition, subtraction, multiplication, and division facts, including focused regrouping and mixed-operation practice.Addition 7 sheets
Subtraction 6 sheets
Mixed operations 4 sheets
Word problems 54 sheets
- Things and the gaps between them
Print 5 pieces → __ cuts - One equation, two unknowns
Print 15c and 8c → exactly 115c - Three shares from one total
Print 92 sweets, 3× and 2 more → __ - Counting pairs
Print 12 people → __ handshakes - The smudged sum
Print 4■ + ■7 = 61 → __ and __ - Counting diagonals
Print 20-sided polygon → __ diagonals - Sum and difference puzzles
Print add to 20, differ by 6 → __ and __ - Socks in the dark
Print 3 colors → __ socks for a pair - Chickens & rabbits
Print 13 heads, 44 legs → __ rabbits - What the leftover means
Print 19 eggs, boxes of 3 → __ boxes - Write your own question
Print answer is "3 coins" → write the question - A number from its remainders
Print ÷3 rem 2, ÷5 rem 3, ÷7 rem 2 → __ - The number that cannot change
Print 1 to 5, sum minus 1 → __ - What two facts settle
Print 3t + 2c + 1k = 96c → t + c + k = __ - Numbers too big to compute
Print 100 sevens multiplied → last digit __ - Can it be done at all?
Print 11 cups, turn 2 at a time → NEVER - The gap between two squares
Print gap 96, both 10–33 → 14 and 10 - Truth-tellers and liars
Print Ana: “Ben and I match” → __ liars - Color it first
Print 6×4, opposite corners cut → NO - The taking game
Print 20 counters, take 1–3 → take __ first - Two jugs and a tap
Print 6L and 11L → exactly 7L - The hundred lockers
Print 100 lockers, flipped by their divisors → __ open - The painted cube
Print 5×5×5 painted, cut up → __ with 2 faces - Integer triangles
Print whole sides, perimeter 20 → __ triangles - The spider and the fly
Print 3×5×6 box, corner to corner → __ - A diagonal through a box
Print 3×5×6 block, corner to corner → __ cubes - Regions of a circle
Print 6 points, all chords → __ regions - Cake numbers
Print 4 flat cuts → __ pieces - The lazy caterer
Print 3 straight cuts → __ pieces - Lattice paths
Print 3 × 7 grid → __ routes - Counting triangles in a grid
Print 3 × 3 dot grid → __ triangles - Fewest coins
Print 1c, 4c, 6c → 8c in __ coins - Counting rectangles in a grid
Print 4 × 4 dot grid → __ rectangles - Domino tilings
Print 2 × 5 strip → __ tilings - Who am I? number puzzles
Print digits add to 16, multiple of 4 → ____ - The fake coin
Print 9 coins, one light → __ weighings - Addition word problems
Print 7 friends + 4 more = __ - Subtraction word problems
Print 18 − 5 = __ left - Multiplication word problems
Print 3 shelves × 8 = __ - Division word problems
Print 24 shared by 3 = __ - Mixed word problems
Print + − × ÷ in a story - Two-step word problems
Print 6 × 7, then + 11 = __ - Three-step word problems
Print three steps, one answer - Fraction word problems
Print 3/8 − 2/8 = __ - Odd one out
Print 12, 25, 98, 72 - Spot the error
Print Ana wrote 91 + 79 = 160 - Always, sometimes, never
Print "Taking away makes it smaller" - Decimal word problems
Print $2.75 + $2.25 = __ - Geometry word problems
Print a rug 4 m by 11 m - Equation word problems
Print x + 12 = 27 - Median, mode, and range word problems
Print median of the set = __ - Probability word problems
Print P(red) = __ - Systems of equations word problems
Print x + y = 30, x − y = 6 - Quadratic equation word problems
Print x(x + 4) = 96
Place value 9 sheets
- Whole-number place value
Print 3̸4̸7 → 40 - Identifying place value digits
Print tens digit of 347 → 4 - Expanded form
Print 105 = 100 + 5 - Composing numbers from expanded form
Print 300 + 40 + 7 → 347 - Naming the place
Print 4 in 347 → tens - Estimating sums and products
Print 83 × 32 ≈ ? - Estimating differences
Print 487 − 213 ≈ 280 - Estimating products
Print 83 × 32 ≈ 2,400 - Rounding numbers
Print 487 → 490
Multiplication 14 sheets
11 sheetsTimes tables23456789101112- Missing factors
Print 7 × __ = 42 - Multiplication facts
Print 7 × 6 = __ - Times tables to 12
Print 8 × 12 = __ - Multiplication by 2
Print 7 × 2 = __ - Multiplication by 5
Print 7 × 5 = __ - Multiplication by 10
Print 7 × 10 = __ - Multiplication by 3
Print 7 × 3 = __ - Multiplication by 4
Print 7 × 4 = __ - Multiplication by 6
Print 7 × 6 = __ - Multiplication by 7Print 7 × 8 = __
- Multiplication by 8
Print 8 × 6 = __ - Multiplication by 9
Print 9 × 7 = __ - Multiplication by 11
Print 11 × 7 = __ - Multiplication by 12
Print 12 × 8 = __
Division 13 sheets
- Division facts
Print 24 ÷ 6 = __ - Missing number division
Print 33 ÷ __ = 11 
11 sheetsDividing by a number23456789101112- Dividing by 2
Print 18 ÷ 2 = __ - Dividing by 3
Print 27 ÷ 3 = __ - Dividing by 4Print 36 ÷ 4 = __
- Dividing by 5
Print 45 ÷ 5 = __ - Dividing by 6
Print 42 ÷ 6 = __ - Dividing by 7
Print 63 ÷ 7 = __ - Dividing by 8
Print 56 ÷ 8 = __ - Dividing by 9
Print 72 ÷ 9 = __ - Dividing by 10
Print 80 ÷ 10 = __ - Dividing by 11
Print 77 ÷ 11 = __ - Dividing by 12
Print 96 ÷ 12 = __
Percents 13 sheets
- Percent increase and decrease
Print 25% more than 80 - Percent decrease
Print 40% less than 25 - Percent of change
Print 80 → 100 - Simple interest
Print $500 at 4% for 3 years - Percent of a number
Print 10% of 200 = __ - What percent is it?
Print 18 out of 24 = __% - Finding the whole
Print 12 is 25% of __ - Percent error
Print actual 50, measured 54 - Sales tax
Print $50 game, 8% tax → $54 - Tips and gratuities
Print $40 bill, 15% tip → $6 - Discount and sale price
Print $80 jacket, 25% off → $60 - Decimals and percents
Print 0.45 = __% - Percent to decimal
Print 45% = __
Fractions 14 sheets
- Equivalent fractions
Print 1/2 = ?/8 - Comparing fractions
Print 3/4 ? 2/3 - Simplifying fractions
Print 6/8 → 3/4 - Improper fractions to mixed numbers
Print 17/5 = __ - Mixed numbers to improper fractions
Print 3 1/4 = __ - Adding like fractions
Print 1/6 + 2/6 = ? - Adding and subtracting like fractions
Print 5/6 − 2/6 = ? - Adding unlike fractions
Print 1/2 + 1/3 = ? - Subtracting fractions
Print 3/4 − 1/6 = ? - Adding and subtracting mixed numbers
Print 2 3/4 + 1 1/2 = ? - Adding mixed numbers
Print 2 3/4 + 1 1/2 = ? - Subtracting mixed numbers
Print 3 1/5 − 1 1/2 - Fractions and decimals
Print 1/3 → 0.3‾ - Decimals to fractions
Print 0.62 = __/__
Decimals 7 sheets
- Adding and subtracting decimals
Print 3.75 + 1.4 = __ - Adding decimals
Print 4.78 + 11.01 stacked - Subtracting decimals
Print 17.9 − 14.91 stacked - Adding and subtracting uneven decimals
Print 4.5 + 12.375 stacked - Decimal place value
Print 3.4[7] → __ - Comparing decimals
Print 0.7 __ 0.65 - Multiplying and dividing by powers of ten
Print 2.5 × 100 = __
Ratios & proportions 8 sheets
- Ratios and proportions
Print 6 : 8 = ___ : ___ - Solving proportions
Print 3 : __ = 24 : 64 - Unit rate
Print $10 for 2 = __ each - Sharing in a ratio
Print 40 in 3 : 5 → 25 - Writing a ratio as a percent
Print 3 : 4 → 75% - Constant of proportionality
Print x: 2, 5 y: 24, 60 → k - Finding k from a table
Print x: 2, 5 y: 24, 60 → k - Writing y = kx
Print x: 2, 5 y: 24, 60 → y = 12x
Number patterns 3 sheets
Exponents 14 sheets
- Squares and powers
Print 3⁴ = ___ - Powers of a number
Print 2⁵ = ___ - Cube numbers
Print 11³ = __ - Square roots and cube roots
Print √196 = ___ - Square roots
Print √144 = __ - Cube roots
Print ∛216 = __ - Scientific notation
Print 3.5 × 10⁴ = ___ - Scientific notation: small numbers
Print 6.2 × 10⁻⁴ = ___ - Scientific notation: power of ten
Print 48000 = 4.8 × 10ⁿ - Scientific notation: coefficient
Print 48000 = ___ × 10⁴ - Laws of exponents
Print 3² × 3⁴ = 3ⁿ - Product rule for exponents
Print 2³ × 2⁵ = 2ⁿ - Quotient rule for exponents
Print 5⁷ ÷ 5² = 5ⁿ - Power of a power
Print (2³)⁴ = 2ⁿ
Everyday problem solving
Real-Life Math worksheets
Children measure familiar objects, read temperatures and analog clocks, and work with Canadian, US, or euro money.Real-life math 16 sheets
- Measure objects in centimeters
Print key → __ cm - Read thermometers
Print thermometer → __°C - Read Fahrenheit thermometers
Print thermometer → __°F - Tell time to the quarter hour
Print 🕒 → __:__ - Tell time to five minutes
Print 🕒 → __:__ - Tell time to the minute
Print 🕐 → __:__ - Draw the clock hands
Print 3:15 → draw - Elapsed time
Print 3:15 → 4:00 = ? - Count money
Print $5 + $2 + 25¢ = __ - Counting coins
Print 25¢ + 10¢ + 1¢ = __ - Making change
Print $5.00 − $3.65 = __ - What time will it be
Print 3:45 + 30 min = __ - Finding the start time
Print __ + 45 min = 4:00 - Read beakers
Print beaker → __ ml - Read dial scales
Print dial → __ g - Read a calendar
Print 3rd Friday → __
Metric measurement 7 sheets
- Unit conversion
Print 3 m = ___ cm - Metric length conversion
Print 3 m = ___ cm - Metric mass conversion
Print 2 kg = ___ g - Metric capacity conversion
Print 1.5 L = ___ mL - Customary unit conversion
Print 4 ft = ___ in - Customary weight conversion
Print 2 lb = ___ oz - Customary capacity conversion
Print 1 gal = ___ qt
Grade 4–7 foundations
Pre-Algebra worksheets
Children work multi-digit addition, subtraction, multiplication, and long division, evaluate expressions with parentheses, and find factors, GCF, and LCM.Number & operations 50 sheets
- Column addition & subtraction
Print 364 + 285 = __ - Multi-digit multiplication
Print 234 × 56 = __ - Long division
Print 576 ÷ 8 = __ - Order of operations
Print (3 + 4) × 2 = __ - List the factors
Print 24 → __ - Prime or composite
Print 21 → prime or composite? - Multiples
Print 8 → __ - Greatest common factor
Print 42, 54 → GCF = __ - Least common multiple
Print 4, 6 → LCM = __ - GCF & LCM puzzles
Print GCF 5, LCM 30, two digits → __ and __ - 2-digit by 1-digit multiplication
Print 47 × 6 = __ - 3-digit by 1-digit multiplication
Print 316 × 8 = __ - 2-digit by 2-digit multiplication
Print 34 × 26 = __ - 4-digit by 1-digit multiplication
Print 2431 × 6 = __ - 2-digit by 1-digit long division
Print 84 ÷ 6 = __ - 4-digit by 1-digit long division
Print 3724 ÷ 4 = __ - 4-digit by 2-digit long division
Print 4352 ÷ 16 = __ - Evaluating expressions
Print 3x + 4, x = 5 - Combining like terms
Print 4x + 3 + 2x + 5 - Distributive property
Print 3(2x + 5) - Absolute value
Print |3 − 8| = __ - Solving equations
Print 3x + 5 = 20 - One-step multiplication and division equations
Print 3x = 21 - Two-step equations
Print 3x + 5 = 20 - Solving inequalities
Print x + 7 > 12 - Multiplication and division inequalities
Print −2x < 8 - Two-step inequalities
Print 2x + 3 ≤ 11 - Variables on both sides
Print 5x + 3 = 2x + 18 - Slope and y-intercept
Print y = 3x + 5 - Slope from an equation
Print y = 3x + 5 → m - Y-intercept from an equation
Print y = 3x + 5 → b - Slope from two points
Print (2, 3) and (5, 9) - Systems of equations
Print 2x + 3y = 1 - Systems by elimination
Print add to cancel y - Systems by substitution
Print y = 2x + 1 - How many solutions?
Print 3x + 2 = 3x + 5 - Number of solutions
Print 3x + 2 = 3x + 5 - Solutions after expanding
Print 2(x + 3) = 2x + 6 - Rational or irrational
Print √16 or √17? - Rational or irrational roots
Print √16 or √17? - Rational or irrational numbers
Print 0.75, π, ⅔ - Estimating square roots
Print √10 ≈ ___ - Square roots between integers
Print √10 is between ___ - Square roots to one decimal place
Print √10 ≈ 3.2 - Is it a function?
Print (1, 3) (2, 5) (1, 7) - Function from ordered pairs
Print (1, 3) (2, 5) (1, 7) - Function from a table
Print x: 2, 4, 2 - Linear or nonlinear
Print y = 2x² + 3 - Linear from an equation
Print y = 2x² + 3 - Linear from a table
Print x: 1 2 3, y: 2 4 8
Decimals 3 sheets
Grade 8–9 · take it apart
Algebra 1 worksheets
Students take a common factor out, spot a difference of two squares, factor x² + bx + c, solve the quadratics that makes solvable, and use the discriminant to say how many real answers there are.algebra-1 46 sheets
- Adding and subtracting polynomials
Print (3x² + 5x) − (x² − 4x) - Factoring x² + bx + c
Print x² + 7x + 12 - Factoring x² − bx + c
Print x² − 9x + 20 - Factoring x² + bx − c
Print x² + 3x − 28 - Difference of two squares
Print 9x² − 64 - Factor a difference of squares
Print x² − 64 - Difference of squares with coefficients
Print 9x² − 64 - Taking out a common factor
Print 12x + 18 - Common factor of two terms
Print 12x + 18 - Common factor of three terms
Print 6x² + 9x + 12 - Solving x² + bx + c = 0
Print x² + 2x − 15 = 0 - How many real solutions?
Print x² + 2x + 5 = 0 - The discriminant
Print x² + 2x + 5 = 0 - Discriminant with a leading coefficient
Print 3x² + 4x + 2 = 0 - Rate of change from a table
Print x: 2, 5, 8, 11 y: 9, 21, 33, 45 - Finding the rate of change
Print x: 2, 5, 8 y: 9, 21, 33 - Initial value from a table
Print x: 2, 5, 8 y: 9, 21, 33 - x- and y-intercepts of a line
Print 3x + 4y = 24 → x-int - Finding the x-intercept
Print 3x + 4y = 24 → x-int - Finding the y-intercept
Print 3x + 4y = 24 → y-int - Writing linear equations
Print (1, 3) and (3, 7) - Line equation from two points
Print (1, 3) and (3, 7) - Point-slope equation of a line
Print m = 2 through (1, 3) - Absolute value equations
Print |x − 3| = 7 - Solving absolute value equations
Print |x − 3| = 7 - Absolute value equations with coefficients
Print |3x − 18| = 3 - Exponential functions
Print f(x) = 3 · 2ˣ - Evaluating exponential functions
Print f(x) = 3 · 2ˣ, x = 4 - Solving exponential equations
Print 3 · 2ˣ = 48 → x - Which rate is greater?
Print A y = 7x B 45 km in 9 hours - Comparing rates in words
Print 60 mi in 5 h vs 84 mi in 7 h - Comparing rates from a table
Print x: 2, 4 y: 10, 20 - Multiplying and dividing in scientific notation
Print (5 × 10³) × (4 × 10²) - Multiplying in scientific notation
Print (5 × 10³) × (4 × 10²) - Dividing in scientific notation
Print (8 × 10⁵) ÷ (2 × 10²) - Function notation
Print f(x) = 3x − 5 - Evaluating functions
Print f(x) = 3x − 5, find f(−4) - Composing functions
Print f(g(2)) - Arithmetic and geometric sequences
Print 3, 7, 11, … 20th term - Solving quadratics by square roots
Print x² = 49 - Arithmetic sequence nth term
Print 5, 12, 19, … 20th term - Common difference of a sequence
Print 5, 12, 19, 26 → d - Geometric sequence nth term
Print 3, 6, 12, … 8th term - Common ratio of a sequence
Print 3, 6, 12, 24 → r - Solving x² = p by square roots
Print x² = 49 - Solving (x − h)² = k by square roots
Print (x − 2)² = 9
Grade 3–8 shape and measure
Geometry worksheets
Children count unit squares, measure perimeter, area, volume and surface area, name angles and triangles, count lines of symmetry, and work with circles and the Pythagorean theorem.Shape & measure 73 sheets
- Naming 2D shapes
Print triangle / square / pentagon - Naming quadrilaterals
Print rhombus / kite / trapezoid - Area by counting squares
Print a 6 x 4 grid of unit squares - Area of irregular shapes
Print an L-shape on unit squares - Perimeter of a rectangle
Print P = 2(8 + 5) - Area of a rectangle
Print A = 8 x 5 - Area & perimeter puzzles
Print A = 48, P = 28 → __ and __ - Perimeter of triangles and quadrilaterals
Print 12 + 5 + 8 + 5 - Perimeter of a triangle
Print 9 + 12 + 7 - Perimeter of a parallelogram
Print 2(8 + 5) - Perimeter of a trapezoid
Print 12 + 5 + 8 + 6 - Missing side length
Print A = 48, one side 6 - Find a side from the area
Print A = 48, one side 6 - Find a side from the perimeter
Print P = 28, one side 6 - Types of angles
Print acute / right / obtuse - Classifying triangles
Print scalene / isosceles / equilateral - Classify triangles by sides
Print equilateral / isosceles / scalene - Classify triangles by angles
Print acute / right / obtuse - Lines of symmetry
Print a regular hexagon - Volume of a rectangular prism
Print V = 6 x 4 x 3 - Missing edge from the volume
Print V = 120, 4, 5 → x - Area of a triangle
Print A = (b x h) / 2 - Volume of composite solids
Print 6 x 4 x 3 plus 6 x 2 x 2 - Area of a parallelogram
Print A = b x h - Area of a trapezoid
Print A = (a + b) / 2 x h - Area of triangles and quadrilaterals
Print A = (b x h) / 2 - Faces, edges and vertices
Print hexagonal prism → faces - Triangle inequality
Print 6, 7, 13 → No - Surface area of a rectangular prism
Print 2(lw + lh + wh) - Surface area and nets
Print 2(wd + wh + dh) - Surface area from a net
Print 2(wd + wh + dh) - Circumference of a circle
Print C = 3.14 x 10 - Circumference from the diameter
Print C = 3.14 x 10 - Area of a circle
Print A = 3.14 x 5 x 5 - Area of a circle from the diameter
Print d = 10 -> A = 3.14 x 5 x 5 - Arc length and sector area
Print r = 10, 90° slice - Area of composite figures
Print 20 x 12 less 4 x 3 - Complementary angles
Print x + 65 = 90 - Supplementary angles
Print x + 115 = 180 - Vertical angles
Print x equals the opposite angle - Complementary and supplementary angles
Print x + 65 = 90 - Angles on a line and around a point
Print 45° + 55° + x = 180° - Angles in a polygon
Print hexagon → 720° - Angles on a straight line
Print 115° + x = 180° - Pythagorean theorem: find the hypotenuse
Print c squared = a squared plus b squared - Angles around a point
Print 120° + 150° + x = 360° - Pythagorean theorem: find a leg
Print b squared = c squared minus a squared - Pythagorean theorem
Print 6, 8, and the hypotenuse - Exterior angle of a triangle
Print 35° + 55° → x - Angles in an isosceles triangle
Print apex 70° → x - Angles in a triangle
Print 60°, 85°, x = ___ - Volume of a cylinder
Print r = 4 cm, h = 12 cm - Volume of a cone
Print r = 5 cm, h = 15 cm - Volume of a sphere
Print r = 3 cm → __ cm³ - Angles in parallel lines
Print 50°, x = ___ - Corresponding angles
Print the F shape - Alternate angles
Print the Z shape - Similar figures
Print 9 : 18 → 7 : __ - Midsegment of a triangle
Print base 22 → x - Triangle congruence rules
Print marked pair → SAS - Triangle congruence proofs
Print AC ≅ AC → ? - Similar triangle proofs
Print DE ∥ BC → ? - Write a triangle proof
Print Given → Prove - Write a similarity proof
Print Given -> Prove - Distance between two points
Print (3, 0) to (9, 8) - Distance formula
Print (-3, -1) to (2, 11) - Midpoint of a segment
Print (−5, 1) to (−1, −5) - Midpoint formula
Print (-5, 1) to (3, -5) - Transformations on a grid
Print (3, 4) in the x-axis - Dilations
Print (2, 3) scaled by 2 - Translations
Print (2, 5) 3 left, 4 down - Reflections
Print (3, 4) in the x-axis - Rotations
Print (2, 5) a quarter turn
trigonometry 12 sheets
- Trigonometric ratios
Print 3-4-5 → sin A - The six trig ratios
Print 3-4-5 → csc A - Right-triangle trigonometry
Print 20, 65° → x - Finding a missing side
Print 12, 35° → side - Finding a missing angle
Print 9, 12 → angle - Radians and degrees
Print 90° → π/2 - Exact trig values
Print sin 30° → 1/2 - Pythagorean identity
Print sin A = 3/5 → cos A - Cofunctions of complementary angles
Print sin 40° → cos 50° - Law of sines
Print a, ∠A, ∠B → b - Law of cosines
Print a, b, ∠C → c - Area of a triangle with sine
Print a, b, ∠C → area
Grade 1–3 read a chart
Graph and data worksheets
Children read tally charts, picture graphs, bar graphs, and line plots — how many, how many more, how many altogether — from a chart that is itself the question.Graphs and data 35 sheets
- Tally charts
Print ∣∣∣∣ = ? - Bar graphs
Print How many more? - Picture graphs
Print = ? - Line plots
Print How many at 3½? - Mean, median, mode, and range
Print Mean of 4, 7, 3, 6, 5 - Finding the mean
Print mean of 4, 7, 3, 6, 5 → 5 - Finding the median
Print 3, 8, 4, 6, 9 → 6 - Finding the mode
Print 2, 5, 5, 7, 9 → 5 - Missing number from the mean
Print 6, 7, 9, 10, □ → mean 8 - Range of a data set
Print 3, 9, 4, 12, 7 → 9 - Mean absolute deviation
Print 2, 4, 4, 5, 10 → 2.4 - Interquartile range
Print 4, 7, 13, 23, 26, 41, 47 → 34 - Predicting counts from probability
Print P(red) = 3/10, 200 spins → 60 - The counting principle
Print 4 shirts, 3 shorts → 12 - Two rules, two patterns
Print Add 3 / Add 9 - Reading box plots
Print Q1 → __ - Box plot range and IQR
Print box width → IQR - Relating two number patterns
Print top × 3 = bottom - Points on a coordinate grid
Print A = (3, 5) - Plotting points
Print plot (3, 5) - Two-way tables
Print Grade 7 / Pet / Total - Completing two-way tables
Print row total 25, cells 18 + ▢ - Circle graphs
Print 25% of 200 = __ - Relative frequency
Print 18 of 25 → 72% - Histograms
Print 20–29 → how many? - Stem-and-leaf plots
Print 3 | 1 2 5 → 31, 32, 35 - Box plots
Print median → __ - Predicting counts from a fraction
Print 3/10 of 200 → 60 - Predicting counts from a percent
Print 30% of 200 → 60 - Probability
Print 4 blue of 12 → 1/3 - Two-stage counting principle
Print 4 shirts × 3 shorts → 12 - Three-stage counting principle
Print 3 × 2 × 4 → 24 - Scatter plots
Print rising cloud → positive - Simple probability
Print 3 red of 12 → 1/4 - Complementary events
Print P(red) = 1/4 → P(not) = 3/4