Adding, Subtracting, Multiplying, and Dividing Integers

Addition

100

4+(-4)

What is 0

200

-15+(-17)

What is -32

300

-35+27

What is -8

400

-435+847

What is 412

500

-57+76+-64

What is -45

Subtraction

100

5-(-4)

What is 9

200

-54-13

What is -67

300

35-(-60)

What is 95

400

-98-50

What is -148

500

30-(-60)-32

What is 58

Multiplication

100

8*8

What is 64

200

-9*12

What is -108

300

-15*-7

What is 105

400

32*-21

What is -672

500

-50*-12*-6

What is -3,600

Division

100

90/3

What is 30

200

40/-5

What is -8

300

-100/25

What is -4

400

-72/-9

What is 8

500

100/-2/-5

What is 10

Word Problems

100

Joe said -75+54 was 129.Is he wrong, and if so then explain his error and give the real answer to the problem.

What is yes, because he added 75+54 instead of -75+54, which is -21

200

Joe was 2,000 feet above sea level. His friend Bob was 1,568 feet below sea level. Joe wanted to know what the distance was between them. This was that distance.

What is 3,568 ft

300

Billy said -89+56 is -33. Is he wrong, and if so explain his error and write the right answer.

What is no

400

Harry was plying football.He started at twenty yards. He got the ball, but lost ten yards. The next play he gained fifteen, and the next play he lost five. What yard is he at now?

What is 20

500

Sally says -12*-12*-5 is -720, but Sarah says -12*-12*-5 is 720. Who's right? Explain.

What is -720, because -12*-12 is 144, since two likes equal a positive, times five is is 720, since differences equal a negative.