Show:
Basic Addition
Subtraction
100

What is 9 + 2

11

100

What is 9-0

9

200

What is 2 + 8

10

200

What is 5 - 4

1

300

What is 4 + 4

8

300

What is 13 - 2


11


400

What is 6 +3

9

400

What is 11 - 3

8

500

What is 9 + 8

17

500

What is 10 - 10

0