Computing Integers

-14 + 32

• -46

• -18

• 46

• 18

18 - (-12)

• 30

• 6

• -30

• -6

-6 x -8

• -48

• 48

• -14

• -2

-72 / 9

• -7

• -63

• -8

• 8

Match the following

• 1

• -4 - (-6)

• -8

• 8 - (-5)

• -4

• 10 - 9

• 13

• 1 - 5

• 2

• -7 + (-1)

A submarine is submerged at 20 feet below the surface. The submarine is now  descending at a rate of 120 feet per minute. Which integer represents the position of the submarine after 3 minutes?

• • -20 feet below the surface

• -380 feet below the surface

• -360 feet below the surface

A submarine was 1800 ft below sea level. It dove another 1500 feet deeper. Which integer represents its location?

• -300

• -1300

• -3300

• 300

Match the following with the correct operation and sign of the answer.

• subtract, positive

• -1239 + 904

• subtract, negative

• -762 + (-481)

• add, positive

• 3 + 5

• add, negative

• -717 + 927

In a class test, +4 marks were awarded for the correct answers and -1 mark for the wrong answers. Student scores 40 marks. If his correct answers were 11, find his wrong answers.

• 2

• 4

• 6

• 8

If I am subtracting integers, I need to change the problem to addition by ​ ​ (a)   ​ the ​ (b)   ​

• opposite

• subtracting

• same sign

• adding