2nd grade
Hundreds, Tens and Ones with Blocks
Six sets of base-ten blocks with hundreds flats, tens rods and ones cubes. Kids count each and write the number.
Math worksheet · Place value and number decomposition
Regroup Tens and Ones
Eight numbers written three ways: 45 is 4 tens 5 ones, and also 3 tens 15 ones, and 2 tens 25 ones.
- Grade level
- Grades 1–2
- Time
- About 20 minutes
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- Place value, Expanded form, Comparing and ordering numbers, Rounding
What kids do
“Break one ten into 10 ones each time you move across. Fill in the missing ones.”
Printed on the sheet:
- Example: 45 = 4 tens 5 ones = 3 tens 15 ones = 2 tens 25 ones.
Teacher tip
Use base-ten blocks to trade one rod for ten cubes, then write the new way.
How to use it
- Read each number out loud as a class so kids hear the place names.
- Let kids use a place value mat or a folded paper chart under their sheet.
- Do the first problem together under a document camera, then let kids finish on their own.
Watch for
Rounding the wrong digit. Have kids underline the place they are rounding to first.
Talk about it
- What happens to a number when you move a digit one place to the left?
- Which problem was the hardest? What made it hard?
Take it further
Make number riddles: “I have 3 hundreds, no tens and 7 ones.”
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
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Count by 10s and 100s from Any Number
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Grades 2–3
Round on a Number Line
Eight numbers to mark on a number line between two tens or two hundreds. Kids see which one is closer and round.
4th grade
Place Value Chart to Millions
Nine numbers up to 9,999,999 to write in a place value chart, one digit in each column, from millions to ones.
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