Adding and Subtracting Rationals

Adding Fractions

100

2/3 + (-4/9)

2/9

200

-3/8 + (-3/10)

Simplified!

-27/40

300

3/8 + (-2/9)

11/72

400

-5/12 + (-10/11)

-175/132

500

-13/15 + 8/9

1/45

Adding Decimals

100

2.7 + (-1.8)

0.9

200

-8.8 + (-7.7)

-16.5

300

-14.2 + 5.9

-8.3

400

-29.36 + (-9.5)

-38.86

500

-100.06 + 49.365

50.695

Subtracting Fractions

100

3/4 - 1/3 

5/12

200

1/5 - 6/7

-23/35

300

-3/8 - 4/11

-65/88

400

-11/12 - (-5/7)

-17/84

500

-13/14 - 5/6 

Simplified!

-37/21

Subtracting Decimals

100

7.5 - 8.9

-1.4

200

-15.3 - 11

-26.3

300

23.26 - (-9.6)

32.86

400

-103.07 - (-109.805)

6.735

500

-200.07 - (-179.89)

-20.18

Anything!

100

3 1/2 + (-4 1/4)

-3/4 or -0.75

200

15 - (-3 1/2)

37/2 or 18.5 or 18 1/2

300

2.5 - (-5 1/5)

7.7 or 7 7/10

400

-17/50 - (-3.5)

Simplified!!

79/25 or 3 4/25 or 3.16

500

-4 5/7 - (-7.1)

167/70 or 2 27/70