Mastering Integer Addition and Subtraction

Front

Adding two positive integers

Back

Sum is positive

Front

Adding two negative integers

Back

Sum is negative

Front

Adding a positive and a negative integer

Back

Subtract the numbers and the sign is determined from the number that "overpowers"

Front

Subtracting a larger number from a smaller number

Back

Result is negative

Front

Changing subtraction to addition

Back

Keep the first number and add the opposite (keep change change)

Front

-5 + 3

Back

-2

Front

7 - (-2)

Back

9

Front

-4 - 6

Back

-10

Front

8 + (-3)

Back

5

Front

-7 + (-2)

Back

-9