Add and Subtract Integers

Add

100

 -2 + 5

3

200

-1 + (-5)

-6

300

4 + (-3)

1

400

15 + (-10)

5

500

-27 + (-3)

-30

Subtract

100

-2 - 1

-3

200

-7 - (-4)

-3

300

5 - 9

-4

400

(-18) - 14

-32

500

90 - 100

-10

Add (Challenge!)

400

-409 + 27

-382

500

40 + (-285)

-245

Subtract (Challenge!)

400

-25 - (-32)

7

500

-486 - 27

-513

Word Problem

100

The temperature in New York was -8F at midnight, then decreased by 13F by the morning. What was the temperature in the morning?

-21 F

200

A scuba diver is swimming at an altitude of -38 meters, then ascends 12 meters towards the water’s surface. What is the diver’s new elevation?

-26 meters

300

Maggie currently has a balance of $-15 in her bank account, she deposits $11 into her account. How much money does Maggie have in her account?

$-4

400

A bird is flying at an elevation of 28 feet above sea-level. A fish is swimming directly below the bird at an elevation of -9 feet. What is the distance between the bird and the fish?

37 feet

500

Chad doesn’t have any money, but he owes his sister $14, owes his brother $9, and owes his friend $24. What integer could be used to represent the amount of money Chad has?

$-47