What is Missing?
10, _____, 20 , 25, 30
15
48 ____
49
_____10
9
9 8
9
5, 6, 7, 8
by ones
45, 46,______, 48
47
11 ____
12
_____ 20
19
31 13
31
30, 40, 50, 60
skip count by tens
40, _____, 60, 70
50
66____
67
______ 54
53
56 19
56
55, 60, 65, 70
skip count by fives
16, 26, _____, 46
36
29____
30
______ 17
16
25 30
30
17, 27, 37, 47
skip count by tens
_____, 65, 70, 75
60
12 _____
13
______ 79
78
11 21
21
43, 44, 45, 46
by ones