Adding and subtracting tens
The problem that does not equal 9.
1+8
2+5
4+4+1
2+5
84
46 + 7= ______.
40 + 13 = ______.
53
12 - 5 = 5 12 + 7 = 19
12 - 7 = 5 5 + 7 = 12
12 - 7 = 5
62 + 15 = _____
77
40 + 20 =
60
The number that is 40 more than 30.
70
44 + 6 = ______
40 + 10 = ______
50
28 + 30 = 58
The related fact is
58-30=28
45 + 30 = ______
75
90-40=
50
The number that is 45+6.
51
23 + 19 =
20 + 12 =
42
The related fact for 65 - 20 = 45 is ...
45 + 20 = 65
72 + 19 = _____
91
The way that names the number 53.
20+30 4 tens 3 ones
50+3 80 - 30
50+3
The number that is 56 + 40.
96
17 + 19 =
20 + 16 =
36
28 ants on the grass. 10 move to the tree and come back. How many on the grass?
28 ants
35 + 10 + 10 + 10 =
65
Sam has 90 pennies and give 80 to Jenny. How many pennies does he have left?
10 pennies
The number that is 55 + 17.
72
39 + 39 =
60 + 18 =
78
44 birds on a branch. 10 fly away. 10 more fly away and then 10 return. How many birds on the branch?
34 birds
64 + 36 =
100