1st grade
Number Bonds Within 20
Twelve number bonds. Kids find the missing part or the whole, breaking numbers up to 20 into two parts.
Math worksheet · Place value and number decomposition
Tens and Ones
Eight sets of base-ten blocks. Kids count the tens and ones and write the number.
- Grade level
- Grades 1–2
- Time
- About 15 minutes
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- Place value, Expanded form, Comparing and ordering numbers, Rounding
What kids do
“Count the tens (long bars) and the ones (small cubes). Write the number.”
Teacher tip
Count the tens by tens out loud (10, 20, 30) and then switch to ones. That switch is the skill.
How to use it
- Build the first number with base-ten blocks before kids write anything.
- Draw a place value chart on the board and keep it up while kids work.
- Do the first problem together under a document camera, then let kids finish on their own.
Watch for
Zeros as placeholders. Kids often write 307 as 37 or three hundred seven as 3007.
Talk about it
- Which is bigger and how can you tell without counting?
- Which problem was the hardest? What made it hard?
Take it further
Play “build the biggest number” with digit cards in pairs.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
More place value and number decomposition worksheets
Grades 2–3
Hundreds, Tens and Ones
Ten three-digit numbers to break into hundreds, tens and ones and write in expanded form.
Grades 3–5
Expanded Form and Word Form
Numbers into the thousands written three ways: standard form, expanded form and word form.
Grades 3–4
Rounding to 10, 100 and 1,000
Eighteen numbers to round to the nearest ten, hundred and thousand. Five or more rounds up.
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