Question

How do you subtract an integer from another integer without using

number line? Give an example.
a

Answer 1

9-8=1

7-(-6)=13

Explanation:

you just add it the normal way.

Answer 2

See below

Explanation:

See following examples

a and b

• a- b

a and -b

• a - (-b) = a + b

-a and b

• -a - b = -(a + b)

-a and - b

• -a - (-b) = -a + b = b - a