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.
Math worksheet · Place value and number decomposition
Count by 10s and 100s from Any Number
Nine number trains that count by tens and hundreds from numbers like 23, 156 and 215. Only one digit changes each time!
- Grade level
- 2nd grade
- 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 by 10s or 100s. Which digit changes? Write the missing numbers.”
Teacher tip
Ask kids to highlight the digit that changes in each train.
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
- Why do we round? When is an estimate good enough?
- Which problem was the hardest? What made it hard?
Take it further
Have kids find big numbers in the newspaper or a fact book and write them in expanded form.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
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Grades 4–5
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