100
15-8 = _______
What is 7
100
15 + 12 =
What is 27?
200
13-8 = ______
What is 5
200
31-20 = ____
What is 11?
300
54 - 23 =
What is 31?
300
52 + 12 =
What is 64?
400
76-24 = ____
What is 52?
400
76 + 45 =
What is 121?
500
17-13 = _____
What is 4?
500
98 - 42 =
What is 56?
500
225+113 =
What is 338?
500
65 + 11 =
What is 76?