Addition
15 + 6 =
21
10 + 6
16
How many ones are in 43?
3
12 - 11 =
1
What is the missing number?
39, 40, 41, ___, 43
42
8 + 8 =
16
13 + ? = 16
3
How many ones are in 67?
7
13 - 7 =
6
How many tens does the number 53 have?
5 tens
9 + 10 =
19
16 - 8 = ?
8
How many ones are in 99?
9
14 - 7 =
7
What is the missing number?
74, 75, ___, 77, 78
76
14 + 5 =
19
18 + 4 =
22
How many ones are in 6?
6
18 - 6 =
12
Follow the pattern: 40, 45, 50, ___
55
50 + 50 =
100
5 tens and 4 ones =
54
How many ones are in 154?
4
100 - 40
60
What is the missing number?
23, 24, 25, ___, 27
26