Use benchmarks to estimate the sum.
1. 11/15+1/8.
A:about 1/2
B:about 3/4
C:about 1
D:about 1 1/2
To estimate the sum of 11/15 + 1/8 using benchmarks, you can find the closest benchmark fractions and then add them together.
Step 1: Find the closest benchmark fractions for each fraction:
- The closest benchmark fraction of 11/15 is 3/4.
- The closest benchmark fraction of 1/8 is 1/8 itself.
Step 2: Add the benchmark fractions:
- 3/4 + 1/8 = 6/8 + 1/8 = 7/8.
So, the estimated sum of 11/15 + 1/8 is about 7/8.
Therefore, the correct answer is B: about 3/4.