Addition
2 + 1
3
2 - 1
1
2 __ __ __
3, 4, 5
11
11
Name the missing number
10 __ 30 40 50
20
5 + 0
5
7 - 0
7
4 __ __ __
5, 6, 7
13
13
Name the missing number
5 __ 15 20 25
10
2 + 2
4
3 - 2
1
7 __ __ __
8, 9, 10
16
16
Name the missing number
10 20 30 __ 50
40
3 + 2
5
2 - 2
0
10 __ __ __
11, 12, 13
12
12
Name the missing number
5 10 15 __ 25
20
5 + 2
7
8 - 4
4
15 __ __ __
16, 17, 18
19
19
Name the missing number
50 60 __ 80 90
70