Addition
2 + 6
= 8
11 - 5
= 6
How many tens are there in 45?
4
30, 31, 32,
33
50 ____ 52
51
7 + 9
= 16
10 - 5
= 5
0
45, 44, 43,
42
79 ____ 81
80
5 + 8
= 13
16 - 4
= 12
What number has 6 ones and 3 tens?
36
76, 77, 78,
79
63 ___ 65
64
11 + 4
= 15
20 - 18
= 2
What number has 8 tens and 2 ones?
82
93, 92, 91,
90
90 ____ 92
91
13 + 8
= 21
18 - 9
= 9
How many ones are in all of 89?
89
108, 109,
110
110 ___ 112
111