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Who doesn't like surprises?
Subtracting Fractions
Adding Mixed Numbers
Subtracting Mixed Numbers
100

1/3 + 1/9 

4/9 

100

9/9 + 2/18 

1 1/9 or 10/9 

100

7/8 - 1/4

5/8 

100

5 2/8 + 3 1/8

8 3/8 or 67/8 

100

6 2/3 - 5 1/3

1 1/3 or 4/3 

200

3/5 + 1/9

32/45

200

5/12 - (-2) 

2 5/12 or 29/12 

200
7/10 - 2/4
1/5
200

5 3/7 + 2 5/7

8 1/7 or 57/7 

200

8 5/16 - 3 12/16

4 9/16 or 73/16 

300

5 1/2 + 2/9

5 13/18 or 103/18 

300

1 2/8 + 5/12

1 2/3 or 5/3 

300
6/7 - 1/2
5/14
300

4 1/10 + 6 1/2

10 3/5 or 53/5 

300

13 1/12 - 8 1/4

4 5/6 or 29/6 

400

(-3 3/5) + 3/2 

-2 1/10 or -21/10 

400

5/8 + 5/6

1 11/24 or 35/24 

400
1/2 - 3/10
1/5
400

1 7/12 + 2 3/8

3 23/24 or 95/24

400

6 - 2 4/5

3 1/5 or 16/5 

500

1 2/5 - (-3 3/4) 

5 3/20 or 103/20 

500

1 1/2 + (-3 3/5) = 

-2 1/10 or -21/10 

500
5/12 - 4/16
1/6
500

2 3/4 + 7 3/5

10 7/20  or  207/20 

500

6 1/8 - 2 5/6

3 7 /24 or 79/24