Rational Number Arithmetic - Unit 1

Addition

100

8 + (-3) 

5

200

(-9) + (-15)

-24

300

1/6 + (-3/10)

-4/30 or -2/15

400

Find x + y when 

x = -16/3, y=-7/4

-85/12

500

3 5/6 + (-1 1/2) 

14/6 or 7/3

600

1.25 + (-2 1/2) 

-1.25 or 

- 1 1/4

Subtraction

100

5 - 11

-6

200

-11 - (-13)

2

300

15 - (-4)

19

400

Find x - y when 

x = 9/5 , y = 9/10

9/10

500

4 5/6 - 2 1/3

15/6 or 5/2 

600

-5 1/2 - (-4.75) 

-0.75 or -3/4 

Multiplication

100

(-6)(-7)

42

200

-19 * 5

-95

300

-4 * 5/7

-20/7

400

-12/5 * -4/8

48/40 or 6/5

500

5 1/3 * 2 2/5

192/15

600

Solve for x

x/4 = -12

x = -48

Division

100

18/(-6)

-3

200

(-184)/8

-23

300

4 div 4/7

7

400

13/5 div -7/2

-26/35

500

3 2/5 div 2 1/3

51/35

600

Solve for z

-20z = -100

z = 5

Comparing/Ordering

100

Use <, >, = to compare the following numbers

|-12| ____ |12|

=

200

Use <, >, = to compare the following numbers

-6.45 ____ -6.54

>

300

Order the following numbers from least to greatest.

-1.78, |-2|,  4/9 , |6|, -3

-3, -1.78, 4/9 , |-2|, |6|

400

Use <, >, = to compare the following numbers

-16/17 ____  -13/14

-16/17 < -13/14

500

Order the following numbers from least to greatest.

-|-5|, |4-3|, 1.5,  4/6 , 0.99

-|-5|, 4/6, 0.99, |4-3|, 1.5

600

Use <, >, = to compare the following numbers

|-16/3+ -2/3|____|2 1/2 + 4/3 |

|-16/3+ -2/3| > |2 1/2 + 4/3 |

6 > 3 5/6