How can you find 7 + 8 using the "doubles" strategy?
7 7
+ 7 -> +1 +8
____ ___
14 -> +1 15
100
5 + 7 =
12
100
John has 7 pieces of candy. His sister gives him 6 more pieces of candy. How many pieces does John have in all?
13 pieces of candy
100
What is the sum of the TENS in the problem below.
41
+31
____
tens: ____ + _____ = ____
70
100
52
+ 11
____
63
200
Add 32 + 46 using the "break apart" strategy.
32 + 46
30 + 40 = 70
2 + 6 = 8
= 78
200
30 + 10 =
40
200
Reed got 10 toys for his birthday from his parents and sister. His mom gave him 3 toys and his dad gave him 5 toys. How many toys did his big sister give him?
2 toys
200
What is the sum of the ONES in the problem below.
67
+45
____
ones: ____ + ____ = ____
12
200
58
+39
___
1
58
+39
____
97
300
Lisa has 4 rows of toys in her bedroom. There are 3 dolls in each row. How many dolls does she have?
1. Draw an array to represent this problem.
2. Fill out the equation ____ + ____ + ____ + ____ = ____
(check student work)
300
60 + 40 =
100
300
Nick has a fruit basket. Inside his basket he has 13 apples, 40 berries, and 5 oranges. How many pieces of fruit does he have total in the basket?
58 pieces of fruit
300
Solve 56 + 23 by adding together the tens and ones first.
Add the tens: ___ + ___ = ___
Add the ones: ___ + ___ = ____
Add the partial sums: ____ + ___ =
(Check student work for tens total added to ones total to get 79)
300
How can you use doubles to help you solve 43 + 25 + 13?
1
43
25
+13
____ (Students should be circling 3's first)
81
400
Use compensation to solve the problem below:
33 + 19 =
19 + 33 = 52
+1 -1
20 + 32 = 52
400
50 + 10 + 5 =
65
400
Jaden has stickers inside his cubby. Leah gives him 12 more stickers. Now Jaden has 32 stickers.
How many stickers did Jaden have to start with?
20 stickers to start
400
Which is the same amount as 28 + 16 ? *Add this using partial sums to help you solve. * Choose ALL that apply.
A. 20 + 10 + 8 + 6
B. 30 +14
C. 34
D. 44
A, B, D
400
How can you use compatible numbers to help you solve
23 + 37 + 13?
1
23
37
+13
____ (Students should be circling 3 and 7 to make 10 first)
73
500
Draw an open number line to solve 43 + 34.
(Check student work)
77
500
70 + 29 =
99
500
Leah has 20 pencils. Alex has 14 more pencils than Leah. Billy has 10 pencils less than Alex.
How many pencils does Alex have?
How many pencils does Billy have?
Alex has 34 pencils.
Billy has 24 pencils.
500
Solve 56 + 23 + 11 by adding together the tens and ones first.
Add the tens: ___ + ___ = ___
Add the ones: ___ + ___ = ____
Add the partial sums: ____ + ___ =
(Check student work for tens total added to ones total to get 79)
500
How can regrouping help you find 33 + 59? Use place value grouping to solve your answer.