Integer Rules

Adding integers with the SAME sign

• Add the numbers and take sign of bigger number

• Add the numbers and keep the sign

• Subtract the numbers

• Subtract the numbers and keep the sign

Answer explanation

SSS- Same sign sum!

Add the integers and keep the sign.

Examples:

6+2 = 8

-6 +(-2 )= -8

Adding integers with DIFFERENT signs

• Subtract the numbers and keep the sign of the smaller number

• Add the numbers and keep the sign of the bigger number

• Subtract the numbers and keep the sign of the bigger number

• Add the numbers and keep the sign

Answer explanation

DSD- Different Sign Difference

Subtract the numbers and keep the sign of the bigger number

Examples:

-8 + 2 = -6

9+ (-3) = 6

Subtracting integers

• Keep Change Change

• Keep Change Flip

• Subtract the numbers and keep the sign of the bigger number

• Add the integers

Answer explanation

Keep Change Change!

Keep the first number

Change - to +

Change second number to its opposite

Example:

8 - (-3) KCC

8+3

11

Multiplying and Dividing integers with the SAME sign

• the answer is positive

• the answer is negative

Answer explanation

Examples:

5 x 3 = 15

-5 x (-3) = 15

Think 2 of the same fans sitting next to each other!--POSITIVE!

Multiplying and dividing integers with DIFFERENT signs

• The answer is positive

• The answer is negative

Answer explanation

Examples:

-9 x 3 = -27

10/-2 = -5

Think of 2 different fans sitting next to each other---EEK! Negative!

-10 + 2

-2 + 4

-3 - (-4)

-5 + -4

-7 - 3