Adding and Subtracting Integers

Integers

Adding and Subtracting

Integer Song

• Same sign ADD and KEEP

• Different signs SUBTRACT, Keep the sign of the GREATER number

• Then it'll be exact!

Multiple Choice

-6 + (-9)

• same sign add and keep

• different signs subtract, keep the sign of the greater number

Multiple Choice

7 + -4

• same sign add and keep

• different signs subtract, keep the sign of the greater number

Multiple Choice

12 + 7

• same sign add and keep

• different signs subtract, keep the sign of the greater number

KCC

• KEEP the first number the same

• CHANGE the minus to add

• CHANGE the value to its opposite

Multiple Choice

Using KCC:

-7 - 6

• -7 + -6

• 7 - 6

• -7 - (-6)

Multiple Choice

Using KCC:

4 - 7

• 4 - (-7)

• 4 + (-7)

• -4 + (-7)

Ms. Jo's Way- Parenthesize

• Is it a subtraction problem?

• If so, then put a parenthesis around the negative and the second number

• then add an addition symbol in front of the parenthesis

Multiple Choice

-12 - 7

• 12 + (-7)

• -12 + (-7)

• 12 + 7

Multiple Choice

7 - 4

• -7 + (-4)

• 7 + (-4)

• 4 - 7