For questions 1-2, estimate the sum or difference. use the benchmarks, 0, 1/2, and 1.

1. 23/40 - 11/30

a) 0
b) 1
c) 1/2

2. simone measures the width of one cardboard strip as 1/2 yd. a second cardboard strip measures 5/6 yd in width. estimate the combined width of the cardboard strips.

a) about 1/2 yd

b) about 1 yd

c) about 1 1/4

d) about 1 1/2