5/4 Rational Number MCAS Review

Adding Positive/Negative numbers

100

(−7) + 9

2

200

(−8) + (−5)

-13

300

(−6) + 12

6

400

(−2) + 11 + 4

13

500

 (−4.5) + 4.9 + 3.4

3.8

Subtracting Numbers

100

–7 – – 9

-16

200

– 7 – +8

1

300

True or False

–3 – 3 = 0

False

-6

400

-8 + (-5) + (+6)

-9

500

Subtract –6 from –9

-3

Multiplying Positive/Negative Numbers

100

5 x 10

50

200

-4 x -10 =

40

300

-4 x 8

-32

400

9 x -9 x 2

-162

500

6 x -4 x -4

96

Dividing Positive/Negative Numbers

100

35 ÷ 7

5

200

14 ÷ -7 =

-2

300

-40 ÷ -10

4

400

-44 ÷ 11 ÷ 2

-2

500

-30 ÷ -5 ÷ 2

3

Word Problems

100

Alex buys 27 lightbulbs but returns 15.  Write a number sentence to represent this problem.

27 + -15 

27 - 15

200

Kendra loses 8 pencils a week.  If she continues losing pencils for 7 weeks, how many pencils has she lost?

56 pencils lost

300

Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet below sea level. What is the difference between these two elevations?

30,340

400

A submarine was situated 450 feet below sea level. If it descends 300 feet 4 different times, what is its new position?

1,650 feet below sea level

-1,650

500

Lucy dropped $0.67 into a charity box. If James dropped six times the money, how much total was donated between Lucy and James?

0.67 + 6(0.67) = 4.69

4.69