Properties of Addition
Skip counting
Solve for N
Mental Math Subtraction
Mental Math Addition
100
3 + (4+5) = ( 3+4) + 5
What is the associative property of addition?
100
33,35,37,39,41
What is skip counting by 2s.
100
N + 13 = 31 31 - 13 = N
What are inverse operations? What is 18?
100
321-112=200
What is round to the nearest hundred and estimate?
100
16 + 24=
What is 40?
200
62 + 0 = 62
What is the identity property of addition?
200
47, 52, 57, 62,67
What is skip counting by 5s?
200
N-30= 50 Solved for N
What is 80?
200
48-29=
What is 19?
200
28 +32=
What is 60?
300
32 + 54 = 54 + 32
What is the commutative property of addition?
300
123, 133, 143, 153, 163
What is skip counting by 10s?
300
65+72=N solve for n
What is 137?
300
63-37=
What is 26?
300
45 +17=
What is 62?
400
127 + 0 = 127
What is the zero or identity property of addition?
400
321, 421, 521, 621, 721
What is skip counting by 100s.
400
13 + ( n+5)= 21
What is 8?
400
72-49=
What is 23?
400
23 + 27 =
What is 50?
500
2 + 3 = 5 5 - 3= 2
What is the inverse operation?
500
Fill in the blank: 153, 143, 133, 123, ___, ___, ___
What are 113, 103, 93?
500
N + 63 =127
What is 64?
500
56-28=
What is 28?
500
3,242 + 2, 075= 5,000
What is rounding to the nearest thousand to estimate?
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