Addition Properties
Mental Math
3-digit addtion with regrouping
Estimate Sums
Vocabulary
100
Use the Commutative Property of Addition to write two number sentences with the numbers 3, 5, and 8.
3 + 5 = 8 5 + 3 = 8
100
100 more than 427
527
100
183 + 854
1,037
100
Estimate to the nearest ten 87 + 42
90 + 40 = 130
100
To rename a number using place value
regroup
200
When using the Associative Property of Addition, what symbols show you which numbers to add first?
parentheses
200
1 more than 1,509
1,510
200
84 + 209
293
200
Estimate to the nearest hundred 1,276 + 432
1,300 + 400 = 1,700
200
Numbers that are added together in an addition sentence
addend
300
Number sentences that show the Identity Property of Addition ALWAYS use what number?
0
300
1,000 more than 398
1,398
300
277 + 216
493
300
Estimate to the greatest place value 507 + 98
500 + 100 = 600
300
The missing number in a math problem
unknown
400
Write a number sentence that shows the Identity Property go Addition.
example: 7 + 0 = 7
400
10 more than 4,372
4,382
400
382 + 129
511
400
Estimate to the nearest ten 5,927 + 1,076
5,930 + 1,080 = 7,010
400
The answer to an addition problem
sum
500
Write a pair of number sentences that show both the Associative Property and the Identity Property.
example: (8 + 0) + 3 = 11 8 + (0 + 3) = 11
500
1 more than 999
1,000
500
567 + 562
1,129
500
Write a math problem that could be estimated to 730 + 140
example: 733 + 137
500
To change a number to make it easier to work with
round
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