Show:
Simplifying
Expressing
Adding
Subtracting
Dividing
100

2/4

1/2

100

1/2 = ?/8

4/8

100

1/5 + 2/5 =

3/5

100

6/7 - 1/7 =

5/7

100

3/4 ÷ 2 =

3/8

200

6/9

2/3

200

3/? = 12/16

3/4

200

1/3 + 1/4 =

4/12 + 3/12

= 7/12

200

3/4 - 1/2 =

1/4

200

2/5 ÷ 4 =

2/20

= 1/10

300

16/20

4/5

300

4/5 = ?/30

24/30

300

2/5 + 1/10 =

4/10 + 1/10

= 5/10

= 1/2

300

8/9 - 1/3 =

8/9 - 3/9

= 5/9

300

4/7 ÷ 3 =

4/21

400

18/45

2/5

400

?/3 = 6/18

1/3

400

3/7 + 1/6 =

18/42 + 7/42

= 25/42

400

14/15 - 1/2 =

28/30 - 15/30

= 13/30

400

1/3 ÷ 2/5 =

5/6

500

48/64

3/4

500

12/72 = 6/?

6/36

500

2 1/3 + 1 4/5 =

2 5/15 + 1 12/15

= 3 17/15

=4 2/15

500

5 1/2 - 1 1/3 =

5 3/6 - 1 2/6

= 4 1/6

500

3/4 ÷ 1/4 =

12/4

= 3