Module 4 Rational Numbers

Fractions/decimals to commit to memory

100

what is 1/2 as a decimal?

0.5 

200

What is 1/4 as a decimal?

0.25

300

What is 3/4 as a decimal?

0.75

400

What is 1/3 as a decimal?

0.3

500

What is 1/6 as a decimal? 

0.16

Add Rational Numbers

100

30.78 + (-40.30)

-9.52

200

(-9.34)+(-10.4)

-19.74

300

-2/3 + 4/5 

2/15

400

2 1/3 + 4 1/3 

6 2/3 

500

4 1/2 + 7 2/5

11 9/10

Subtract Rational Numbers

100

10.5 - 4.9

5.6

200

-17.8 - (-2.5)

-15.3

300

3 1/2 - (-1 3/10)

4 8/10 or 4 4/5 

400

7 5/12 - (-3 3/4) 

11 1/6 or 11.16

500

(-4 2/5) - (-7 1/10)

2 7/10

Multiply Rational Numbers

100

6(2.45)

14.70

200

3(-5.6)

-16.8

300

2/3(-4/5)

-8/15

400

(-4/5)(-7/8)

28/40

500

5/12(-1/2)

-5/24

Convert to an improper fraction

100

11 1/3

34/3

200

(-9 5/6)

(-59/6)

300

(5 9/10) 

59/10

400

(2 4/7)

18/7

500

(-6 1/3)

(-19/3)