Show:
Addition
Subtraction
Mystery???
100
16 + 16 =
What is 32?
100
16 - 16 =
What is 0?
100
13 + 8 =
What is 21?
200
21 + 19 =
What is 40?
200
21 - 19 =
What is 2?
200
27 - 8 =
What is 19?
300
33 + 28 =
What is 61?
300
33 - 28 =
What is 5?
300
35 + 22 =
What is 57?
400
47 + 13 =
What is 60?
400
42 - 13 =
What is 29?
400
42 - 19 =
What is 23?
500
64 + 46 =
What is 110?
500
64 - 46 =
What is 18?
500
98 - 39 =
What is 59?