Counting Using Base 10 Blocks Worksheets for 1st Grade
Read the two-digit number shown by a group of tens rods and ones cubes. 15 free printable worksheets, each with an answer key.
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Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Counting Using Base 10 Blocks: what children learn
Each tall "tens rod" stands for 10, and each small "ones cube" stands for 1 — reading the number means counting the rods, counting the cubes, and combining them.
Counting Using Base 10 Blocks: worked example
3 tens rods and 4 ones cubes are shown. 34
3 tens rods are worth 30, plus 4 ones cubes worth 4 more, giving 30 + 4 = 34.
Counting Using Base 10 Blocks: a common mistake to watch for
Kids sometimes count every block (rods and cubes together) as if they were all worth 1 — remind them a rod is worth 10 blocks by itself, not 1.
Counting Using Base 10 Blocks: how to help at home or in class
If you have no blocks, make your own: use dry pasta tubes taped in bundles of ten for rods and single pieces for cubes. Lay out a mix and have your child count the bundles by tens first, then continue counting the singles. Say it aloud as a count, like 10, 20, 30, 31, 32. Swap which pile gets counted first and see that the total stays the same. Once your child counts mixed groups correctly, move to regrouping.
What is on these Counting Using Base 10 Blocks worksheets
This set has 15 different worksheets for 1st grade, with 11 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Write the number shown by the blocks.”
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers