Unit 5 Review Operations with integers/rational numbers

Operations With Rational Numbers (x & /)

100

-0.36 * 0.9 =

= -0.324 

(different signs ... product is negative)

200

7 3/4 * (-15/8)

465/32 or 14 17/32

300

(2/9)÷(4/5)

 5/18 

400

(1/7) ÷ (5/2)

2/35

500

(-2/7) ÷ (4/9)

 

-9/14

Operations With Rational Numbers (+)

100

 2.2 + 4.6

 6.8

200

25 + (-27) =

-2

300

 8.5 + -3.5

  5

400

 8.7 + -7.1

 1.6

500

 

-3/4 + 7/2

 

11/4 or 2 3/4

Write Rational Numbers as Decimals

100

Write 1/10 as a decimal.

0.1

200

Write 3/4 as a decimal.

0.75

300

Write 7/20 as a decimal.

0.35

400

Write 3/8 as a decimal.

0.375

500

Write 2/9 as a decimal.

0.2 repeating (line on top of the two)

Operations with Rational Numbers (-)

100

 18 - (-37)

 55

200

 

-7/8-(-5/6)

 

-1/24

300

 

5/8 - (-7/2)

 

33/8 or 4 1/8

400

 

7/4 - (-1/2)

 

9/4 or 2 1/4

500

(-1.82)-(-7.61)

5.79

Integer Application

100

The temperature fell a total of 12^oF in 4 hours. How much did it change each hour?

-3^oF

200

A football team lost 3 yards on each of the 4 plays they ran. What was their overall change in yardage?

-12 yards

300

Mr. Holmes buys 200 yearbooks for $20 each. He then sells all of them for a total of $4,250. How much money did he make or lose overall?

$250 profit

400

A submarine begins the day at sea level, then descends 500 feet. The next day, they ascend 150 feet and then descend 250 feet. What is their elevation at the end of the second day?

-600 feet

500

You are hiking on a mountain and start at an elevation of 25 feet. You descend 30 feet. You ascend 20 feet. You descend 40 feet. You ascend 10 feet. What is your ending elevation?

-15 feet