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

1. 23/40 - 11/30
   
   

A0

B1

C1/2

1. 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.
   
   

Aabout 1/2 yd

Babout 1 yd

Cabout 1 1/4

Dabout 1 1/2