Number & Operations for Teachers 

Copyright David & Cynthia Thomas, 2009

Exercises

1. Construct set and measurement models representing the following integer operations:

a. 5 + 4 = 9

b. 5 + ^-4 = 1

c. ^-5 + 4 = ^-1

d. 2 – ^-7 = 9

e. ^-2 – 5 = ^-7