half of the number
adding fractions
subtracting fraction
adding decimals

100

half of 19

9.5

100

2/5+3/5

5/5

100

10/15-7/15

3/15

100

5.2+7.5

12.7

200

half of 23

11.5

200

4/8+3/8+1/8

8/8



200

3/3-1/3

2/3

200

6.2+3.8

10

300

half of 7

3.5

300

3.5/7+3.5/7

7/7

300

9/5-3/5

6/5


300

14.5+14.5

29

400

half of 180

90


400

7.5/15+7.5/15

15/15

400

19/19-9.5/19

9.5/19

400

7.5+7.5

15

500

half of 15

7.5

500

7/10+3/10

10/10

500

20/100-15/100

5

500

5.7+10.2

15.9