Compensation
Use compensation to find the sum.
38 + 18 =
56
Use an open number line to find the sum.
75 + 19 = __
94
Use a hundred chart to find the sum.
26 + 3 ____
29
Add the tens. Add the ones. Find the sum.
37 +8 ___
30
7 + 8 = 15
30 + 15 = 45
Emily's baseball team is playing a baseball game to raise money for a children's hospital. Emily's team scored 11 runs in the game. The other team scored 8 runs. How many runs were scored in all?
19 runs
Use compensation to find the sum.
12 + 39 = __
51
Use an open number line to find the sum.
62 + 16 =__
78
Use a hundred chart to find the sum.
17 + 11 ____
28
Add the tens. Add the ones. Find the sum.
46 + 24 ____
40 + 20 = 60
6 + 4 = 10
60 + 10 = 70
Lauren has 17 cakes and 24 pies to sell at the bake sale. How many cakes and pies does she have to sell?
41 cakes and pies
Use compensation to find the sum.
67 + 15 = __
82
Use an open number line to find the sum.
49 + 32 = __
81
Use a hundred chart to find the sum.
33 + 19 =
52
Add the tens. Add the ones. Find the sum.
63 + 29 ____
60 + 20 = 80
3 + 9 = 12
80 + 12 = 92
Jordan sells 26 vanilla milkshakes and 19 chocolate milkshakes. How many milkshakes does Jordan sell in all?
45 milkshakes
Use compensation to find the sum.
17 + 36 = __
53
Use an open number line to find the sum.
28 + 28 = __
56
Use a hundred chart to find the sum.
43 + 24 = __
67
Add the tens. Add the ones. Find the sum.
47 + 26 +3
40 + 20 = 60
7 + 6 + 3 = 16
60 + 16 = 76
67 leaves were on the ground and 23 more fell down. Now how many leaves are on the ground?
90 leaves
Find the mistake. This student used compensation, but not correctly.
69 + 29 =100
+1 +1
70 + 30 = 100
If they +1 to one of the addends, then they are supposed to -1 from the other addend.
The correct answer would be 98.
Find the mistake.
36 + 48 = 85
+30 +3 +3
48 78 82 85
They added incorrectly.
78 + 3 = 82, but that's not correct. 78 + 3 = 81
So, 36 + 48 = 84
Find the mistake.
17 + 73 = 89
73
83, 84, 85, 86, 87, 88, 89
17 + 73 = 90
They went down 1 ten, but they only went to the right 6 ones.
Find the mistake.
18 + 29 = 46
10 + 20 = 30
8 + 9 = 16
30 + 16 = 46
18 + 29 = 46
10 + 20 = 30
8 + 9 = 17
30 + 17 = 47
Ms. Baldino's garden has 24 red roses, 36 tulips, 18 sunflowers. How many flowers does she have altogether?
78 flowers