Add
1+2
What number is missing?
10, 20, ______
30
3-1
2
What number is missing?
1, 2, ___, 4
3
What number is missing?
5, ___ , 15
10
2+3
5
What number is missing?
10, ___ , 30,
20
2
What number is missing?
1, 2, 3, 4, 5, _____
6
What number is missing?
5, 10 , 15, 20, ___
25
6+4
10
What number is missing?
10, 20, 30, ____, 50
40
7 - 3
4
What number is missing?
12, 13, 14, ____
What number is missing?
15, 20, 25, ____
30
9+3
12
What 2 numbers are missing?
50, ____, 70, ____
60 & 80
10 - 5
5
What 2 numbers are missing?
20, ____, 22, 23, ____
21 & 24
What 2 number are missing?
10, ___, 20, 25, 30, ___, 35
15 & 35
10+5
15
What 3 numbers are missing?
60, ____, 80, ____, _______
70 , 90, 100
14 - 5
9
What 3 numbers are missing?
19, ____, 21, 22, _____, 24, 25, _____
20, 23, & 26
What 3 numbers are missing?
20, ___, 30, 35, ____, 45, 50, ____
25, 40, & 55