Add
Subtract
Both
100

14+7

What is 21

100

14-7

What is 7

100

19+5

What is 24

200

43+10

What is 53

200

43-10

What is 33

200

78-10

What is 68

300

54+20

What is 74

300

54-20

What is 34

300

64+7

What is 71

400

75+35

What is 110

400

75-35

What is 40

400

75-11

What is 64

500

64+47

What is 111

500

64-47

What is 17

500

10+10-9

What is 11