Estimating
Estimate using benchmarks. 4/10 + 7/12
1
Solve: 1/3 + 5/9
8/9
Solve: 1 1/3 + 2 3/5
3 14/15
6 1/10 - 4 1/2
1 6/10 or 1 3/5
Kendall cuts one board 1/5 of a foot and cuts another board 1/10 of a foot. What is the difference in the lengths of the boards?
1/5 - 1/10 = 1/10 of a foot difference
Estimate using benchmarks. 7/8 - 2/5
1/2
Solve: 10/12 - 1/4
7/12
Solve: 6 1/2 - 2 1/8
4 3/8
3 2/5 - 1 3/4
1 13/20
Maya makes a trail mix by combining 1/2 cup of mixed nuts, 1/4 cup of dried fruit, and 1/8 cup of chocolate chips. What is the total amount of trail mix Maya has?
7/8 cup
Estimate using benchmarks. 5 2/12 + 6 2/3
12
Solve and write as mixed number: 2/3 + 5/6
1 3/6 or 1 1/2
Solve: 3 1/5 + 2 1/4
5 9/20
2 2/3 - 1 8/9
7/9
Jessica works 1 1/5 hours on her science homework, and then she works 2 3/4 hours on her math homework. How many hours did Jessica work on homework?
3 19/20 hours
Estimate using benchmarks. 14 1/3 - 3 3/4
10
Solve and write as mixed number: 7/8 - 1/6
17/24
Solve: 4 5/6 - 1 1/2
3 2/6 or 3 1/3
6 1/2 - 3 6/8
2 6/8 or 2 3/4
A bag of sunflower seeds weighs 5 1/2 pounds. Mr. Clark puts 1 11/16 pounds of the seeds in his bird feeder. How many pounds of sunflower seeds are left in the bag?
3 13/16 pounds
Luisa writes a history report that is 2 1/8 pages long. Therese writes a report that is 1 5/12 pages longer than Luisa's report. Estimate using benchmarks how long Therese's report is.
3 1/2 pages
Solve and write as mixed number: 1/3 + 2/12 + 5/6
1 4/12 or 1 1/3
Solve: 2 2/5 + 1 1/3
3 11/15
8 - 5 4/7
2 3/7
The distance from Malik's home to a grocery store is 6 miles. The distance from his home to a park is 3 3/5 miles. How much farther from Malik's home is the grocery store than the park?
2 2/5 miles