Negation

−318 + (152 + 318)

• 470

• 152

• -152

• 636

-550 + (225 + 550)

• -225

• 225

• 775

• 325

472+(-199+(-472))

• 199

• -771

• 198

• -199

What is the sum of -9 + (-8) + (-7) + .... + 7 + 8 + 9 + 10 + 11 + 12

• 33

• 32

• 36

• 23

What is the sum of -11 + (-10) + (-9) + .... + 9 + 10 + 11

• 1

• -11

• 12

• 0

Answer explanation

What is the sum of

-11 + (-10) + (-9) + ... + 9 + 10 + 11?

Compute

150 . 5 + 75 . (-10)

• 1500

• 750

• -750

• 0

Find the value of:

615 + (-308)(2) + (-615)(-1)

• 1230

• 616

• 614

• 0

(-40) + 150 + (-60) + (-50)

• 10

• -10

• 260

• 0

The initial temperature of a room is 25 degree C. The temperature drops by 8 degree C every hour for 3 hours, and then rises by 5 degree C. What is the final temperature of the room?

• 24

• 18

• 3

• 6

Compute

450 . (4) + 25 . (-3)

• 5

• -5

• 11

• -11