Worked example
A blue strip is 12 cm long and a green strip is 8 cm long. How many centimeters longer is the blue strip?
Answer & why
Answer: 4
Both measurements use centimeters. Subtract: 12 − 8 = 4 cm.
Grade 2 · Math
Find the difference between two lengths
Subtract measurements in the same unit to compare lengths.
6 authored questions + worked example
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All questions
All 6 authored questions for this skill.
Question 1
A blue strip is 18 cm long and a green strip is 11 cm long. How many centimeters longer is the blue strip?
- 7
- 6
- 8
- 9
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 7
Both measurements use centimeters. Subtract: 18 − 11 = 7 cm.
Question 2
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
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 8
Both measurements use centimeters. Subtract: 21 − 13 = 8 cm.
Question 3
A blue strip is 16 cm long and a green strip is 7 cm long. How many centimeters longer is the blue strip?
- 10
- 8
- 9
- 11
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 9
Both measurements use centimeters. Subtract: 16 − 7 = 9 cm.
Question 4
A blue strip is 25 cm long and a green strip is 14 cm long. How many centimeters longer is the blue strip?
- 10
- 11
- 12
- 13
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 11
Both measurements use centimeters. Subtract: 25 − 14 = 11 cm.
Question 5
A blue strip is 12 cm long and a green strip is 8 cm long. How many centimeters longer is the blue strip?
- 3
- 5
- 6
- 4
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 4
Both measurements use centimeters. Subtract: 12 − 8 = 4 cm.
Question 6
A blue strip is 15 cm long and a green strip is 9 cm long. How many centimeters longer is the blue strip?
- 7
- 8
- 5
- 6
A hint
Find the difference between lengths in the same unit.
Answer & why
Answer: 6
Both measurements use centimeters. Subtract: 15 − 9 = 6 cm.