Add Subtract Multiply Negative Numbers

Solve the problem. HINT: the subtraction makes the second fraction negative.

Rules:

Same sign: add and keep the sign

Different signs: subtract and keep the sign of the bigger number

Solve. Rules:

Same sign: add and keep

Different signs: subtract and keep the sign of the bigger number

Solve. Rules:

Same sign: add and keep the sign

Different signs: subtract and keep the sign of the bigger number

Hint: Get a common denominator first (least common multiple).

Use the number line to find the sum.
-4 + (-5) =

• -9

• 9

• -1

• 1

-20+(-11)

• 31

• 9

• -9

• -31

-12 + -9 = ​ (a)   ( ​ (b)   + ​ ​ (c)   )​

• 12

• 2

• -9

• -12

• 9

When you add two negative numbers your answer will be:

• opposites

• positive

• negative

• wrong

(-1) + (-5)=

• 6

• -6

• -4

• 4

Solve the problem.
-2 + (-5)

• 7

• -7

• -3

• 3