Grade 2 · Math
Find the difference between two lengths
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Example & extra help
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A blue strip is 21 cm long and a green strip is 13 cm long. How many centimeters longer is the blue strip?
- 7
- 8
- 10
- 9
See the answer & why
8
Both measurements use centimeters. Subtract: 21 − 13 = 8 cm.
A little hint: Find the difference between lengths in the same unit.
Check that both measurements use the same unit.
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