Positive and Negative Integers

A

100

-2 x -2 = ?

+4

200

2(4+4) =

+16

300

5 (-5 x 2) =

= -50

400

25 x 10 =

250

500

- 15 x - 23 =

345

B

100

-4 x 9 =

- 36

200

-3 (4 + 5) =

=-27

300

7 (-52 + 30)

= -154

400

-80 / 4 =

-20

500

-3 (2-3) = 

3

C

100

(-2 + 4) + 5 x 2 =

= -2 +10

= 8

200

-17 x 21 + 56 - 21

= -357 + 35

=-322

300

= -54+ (-51 x 35)

= -54 + -1785

= -1839

400

9 x 4 (5 x -3) =

= 9 x 4 x -15

=-540

500

2 x -8 x -2 = ?

32

Word Problems

100

It will be – 12º tonight.  The weatherman predicts it will be 25º warmer by noon tomorrow.  What will the temperature be by noon tomorrow?

-12 + 25 = +13

200

 Josie has $47 left in her checking account.  If she writes a check for $55, what will Josie’s balance be?

47 -55= $-8

300

Find the difference in height between the top of a hill 973 feet high and a crack caused by an earthquake 79 feet below sea level.

973 -79 = +894

400

Steve has overdrawn his checking account by $27.  His bank charged him $15 for an overdraft fee.  Then he quickly deposited $100.  What is his current balance?

-27 -15 +100 = +58

500

In Detroit, the high temperatures in degrees Fahrenheit for five days in January were -12°,  -8°,  -3°, 6°,  -15°.  What was the average temperature for these five days?

-12 + -8 + -3 + 6 + -15 = -32 / (number of days) =-6.4