Strategy Check
Using the break apart strategy, solve 16+9
16. +. 9
/ \. |
10 6. 9.
30+40=
70
50-20=
30
What is 3 groups of 5?
15
Gretchen has 24 apples. She picks 16 more.
How many apples does she have in all?
40
Using the Compensation strategy, solve 27 + 34.
27 + 34 = 61
+3 -3
30 + 31 = 61
100
60 − 27 =
33
What is 4 groups of 6?
20
Jake reads 28 pages in the morning and 19 pages at night.
He also drinks 2 glasses of milk.
How many pages did he read?
47
Using the numberline strategy, solve 35 + 42
<----------------------------------------------->
42 +30 72 +5 77
\ / \ /
43+37
80
75 − 36 =
39
What is 5 groups of 8?
40
Volt collects 35 stickers on Monday and 27 on Tuesday.
He gives none away.
How many stickers does he have?
62
Using Ms. Carrolls window method, Solve 66+39
1
56
+39
------
95
96+120
216
84 − 49 =
35
What is 9 groups of 5?
45
Marshall eats 23 slices of pickles, then later eats 16 more.
There are forks and plates on the table.
How many pickles did he eat in all?
39
1
42
+ 49
91
142+387
529
92 − 58 =
34
What is 8 groups of 6?
48
Sarah buys 58 balloons for a party and later buys 29 more.
Her sister watches TV while she shops.
How many balloons does she buy in all?
87