9th grade math worksheets
Need the right level, not just the grade label? Start wherever your child feels comfortable.
Adding and subtracting polynomials
Grade 9
Add, subtract and multiply polynomial expressions
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What to practice this year
Factoring is the year's workhorse, and it is worth separating from solving. Taking out a common factor, spotting a difference of two squares, and factoring x² + bx + c are three distinct reflexes, and a student who has drilled each one recognises which to reach for when a quadratic equation finally asks to be solved. The sheets keep them apart for that reason, then bring them together on the equations.
Why these skills come next
Trigonometry begins with the definition, not the calculator. A trig ratio is a fraction of a right triangle's sides — sin A = 3/5, read straight off the figure — and every triangle here is a Pythagorean triple so the ratio stays exact. That is the ground the solving sheets stand on: once the ratio is a known thing, right-triangle trigonometry uses it to find a missing side or angle.
Nothing matches that. Try a skill, a number, or a topic.
Step 1 of 7
Polynomials and factoring
Add and subtract polynomials, then the three factoring reflexes the year turns on.
Step 2 of 7
Quadratic equations
Solve x² + bx + c = 0 by factoring, and tell how many real solutions there are.
Step 3 of 7
Sequences
Continue an arithmetic or geometric sequence, or write its rule.
Step 4 of 7
Right-triangle trigonometry
Write a ratio as a fraction, then use it to find a missing side or angle.
Step 5 of 7
The unit circle
Convert degrees and radians, and give the exact values at the special angles.
Step 6 of 7
Trigonometric identities
The Pythagorean identity, and cofunctions of complementary angles.
Step 7 of 7
