Subtraction as an Inverse Operation

AKA - KEEP. CHANGE. CHANGE

​

SUBTRACTION AS AN INVERSE OPERATION

Subtraction is the same as the process of adding the ADDITIVE INVERSE (OPPOSITE) of a number to another number

Ex. 7 - 4 = 7 + -4
5 + -3 = 5 - 3



Keep the first number, change the operation to its opposite, then change the next number to its opposite. (KEEP, CHANGE, CHANGE)

KEEP. CHANGE. CHANGE

Write using the additive inverse

1. 10 + 3 =
2. 10 + -3 =
3. 10 - 3 =

Multiple Choice

Write an equivalent equation using the additive inverse

5 - 2

• 5 - -2

• 5 + -2

• -5 - 2

• 5 + 2

Multiple Choice

Write an equivalent equation using the additive inverse

15 + 9

• 15 - (-9)

• -15 - 9

• 15 - 9

• 15 + -9

Multiple Choice

Write an equivalent equation using the additive inverse

25 + -15

• 25 + 15

• 25 - 15

• 25 - (-15)

• -25 - 15

Fill in the Blank

Write an equivalent equation using the additive inverse

8 + 3

-

-

Fill in the Blank

Write an equivalent equation using the additive inverse

45 + -3

-