Answer key · Set A
Fraction stories
1about 1 1/2 11/12 is close to 1, and 1 + 1/2 is about 1 1/2.
23/8 Cut both into eighths: 3/4 = 6/8. Then 6/8 − 3/8 = 3/8.
31 5/12 Cut both into twelfths: 6/12 + 11/12 = 17/12, which is 1 5/12. Do not add the bottoms.
4False Do not add the bottoms. Cut both into twelfths first: 4/12 + 3/12 = 7/12.
5True 1/3 is 2/6. Then 5/6 − 2/6 = 3/6, and 3/6 is 1/2.
63/10 3/4 of 2/5 is 3/4 × 2/5 = 6/20, which is 3/10.
77/12 2/3 of 7/8 is 2/3 × 7/8 = 14/24, which is 7/12.
8about 2 4 1/10 is about 4. Half of 4 is 2, so she gives about 2 meters.
92 3/4 1/6 is 2/12. Then 2/12 + 7/12 = 9/12, which is 3/4. So the total is 2 3/4 meters.
103 1/6 Cut into sixths: 4 1/3 is 4 2/6. Take away 1 1/6: the wholes 4 − 1 = 3 and the parts 2/6 − 1/6 = 1/6. So 3 1/6 liters are left.
111-B, 2-C, 3-A
123, 4, 2, 1 Estimate first, then cut to one bottom, then add the tops, and last check the answer against the estimate.
1312/14 is less than 1, but 11/12 + 1/2 is more than 1. 11/12 is nearly 1, so adding 1/2 makes more than 1. But 12/14 is less than 1. Her mistake was adding the bottoms.
14Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.