Place Value
Decompose 61 by place value.
60 and 1
27 + 32
Make 27 a friendly number and solve
27 will become 25, so 32 will become 34.
the answer is 59
32 + 7 = 33 + 6
True or false
True
Decompose 97 by place value.
90 and 7
Make 42 a friendly number
40 or 45
12 + ___ = 10 + 8
6
Decompose 42 by place value
Decompose 36 by place value
What is 42+36?
40 and 2
30 and 6
78
14 + 6
Make friendly numbers and add
15 and 5
= 20
27
Decompose 87 by place value
what is 87 plus 10?
80 and 7
97
22 + 12
Make friendly numbers and add
20 and 14
or
24 and 10
the answer is 34
56 + 9 = ___ + 42
23
Decompose 55 by place value
Decompose 39 by place value
What is 55 + 39?
50 and 5
30 and 9
94
87 and 9
Make friendly numbers and add
90 and 6
or
10 and 86
= 96
58 + 19 = 31 + 13
True or false
False