Early MathBase-ten blocks to 20
Name: Date:
Count the tens and the ones. Write the number.
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Base-ten blocks worksheets
A two-digit number is not more ones — it is ten of them bundled into one thing you count once. These free printable worksheets draw rods of ten beside loose units and ask for the number they show.
If they get stuck
Base-ten blocks
The answer key prints on a separate page.
What's on this sheet
Each rod is drawn as ten stacked squares rather than a plain bar, because the ten has to stay countable: a child who is not yet sure a rod is ten needs to be able to check, and a bar that hides it turns place value into a rule about columns. The loose ones sit in a five-wide block beside the rods, the same subitising shape the counting sheets use.
Why this sheet works
The levels run to twenty, fifty, and ninety-nine. Twenty is "ten and some ones", which is where the bundling idea lands first; the wider levels are the two-digit standard itself (1.NBT.B.2).