Adding and Subtracting with the Same Denominators

Addition

100

1/4 + 2/4 = 

3/4

200

5/6 + 1/6 =

6/6 = 1

300

8/20 + 6/20 =

14/20 = 7/10

400

22/25 + 12/25 =

34/25 = 1 9/25

500

45/60 + 35/60 =

80/60 = 1 1/3

Subtraction

100

3/4 – 1/4 =

2/4 = 1/2

200

6/6 – 1/6 =

5/6

300

18/20 – 6/20 =

12/20 = 3/5

400

33/40 – 12/40 =

21/40

500

55/60 – 25/60 =

30/60 = 1/2

Lucky Dip

100

7/10 – 3/10 =

4/10 = 2/5

200

9/12 + 7/12 =

16/12 = 1 1/3

300

11/12 – 11/12 =

 0

400

31/40 + 29/40 =

60/40 = 1 1/2

500

41/50 – 39/50 =

2/50 = 1/25

Addition

100

3/8 + 1/8 = 

4/8 = 1/2

200

7/10 + 6/10 =

13/10 = 1 3/10

300

15/18 + 2/18 =

17/18

400

17/30 + 28/30 =

45/30 = 1 1/2

500

27/36 + 25/36 =

52/36 = 1 16/36 = 1 4/9

Subtraction

100

5/8 – 2/8 =

3/8

200

9/12 – 7/12 =

2/12 = 1/6

300

25/30 – 10/30 =

15/30 = 1/2

400

41/50 – 39/50 =

2/50 = 1/25

500

49/72 – 35/72 =

14/72 = 7/36