adding and subtracting
adding dicmales
adding
subtracting

100

what is 2/4 + 1/4

3/4

100

waht is 7.5 + 7.5

15

100

what is 4/7 + 2/7

6/7

100

what is 4/7 - 2/7

2/7

200

what is 12/12 - 10/12

2

200

what is 8.4 + 8.4

16

200

what is 11/10 + 11/10

23/10

200

what is 3/8 - 2/8

1/8

300

what is 6/3 + 1/3

7/3

300

what is 5.5 + 5.5

11

300

what is 35/12 + 3/5

70 /12

300

what is 12/11 - 3/11

9/11

400

what is 10/5 - 5/5

5

400

what is 9.3 + 9.3

18

400

what is 3/2 + 3/2

6/2

400

what is 35/11 - 5/11

20/11