Rounding to the Nearest 10 on a Number Line
Eight rounding problems where each number is shown as a dot on a short number line between its two tens: four two-digit and four three-digit numbers, including one that ends in 5. Third graders look at which ten is closer and write the rounded number. The answer key draws an arrow from the dot to the nearest ten, so the rule for 5 (round up) is easy to explain.
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- Size
- US Letter (8.5 × 11 in), fits A4
- 2 pages: the worksheet and its answer key
- Level
- Grade 3
- License
- Free for personal & classroom use
About this worksheet
Eight rounding problems where each number is shown as a dot on a short number line between its two tens: four two-digit and four three-digit numbers, including one that ends in 5. Third graders look at which ten is closer and write the rounded number. The answer key draws an arrow from the dot to the nearest ten, so the rule for 5 (round up) is easy to explain. It is aimed at third grade, around ages 8 to 9. Say the number in tens and ones: 47 is 4 tens and 7 ones.
On this sheet
right? Write the rounded number. 58 rounds to 22 rounds to 67 rounds to 34 rounds to 944 rounds to 703 rounds to 798 rounds to 675 rounds to ___...
Tips for using it
- Count rods by tens first, then add the ones.
- Let children hop with a finger or a small toy on the line before they draw hops with a pencil.
- Always mark the start number with a dot first; most mistakes come from counting the start as a hop.
- Say "forward" for adding and "back" for subtracting while hopping, so the direction sticks.
Printing tips
Download the PDF and print at 100% (or “fit to page” on A4). Page 1 is the worksheet and page 2 is the answer key with the answers in red; print just page 1 if you want to keep the answers for checking. Free for personal, family and classroom use.
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