Properties of Addition
Addition Patterns
Vocabulary
Estimate by Rounding
Addition
100
6 + 0 = 6
What is the Identity Property of Addition?
100
1 more than 75
What is 76?
100
Doing math in your head.
What is mental math?
100
Estimate by rounding to the nearest 10. 75 + 12
What is 90?
100
192 + 464
What is 656?
200
8 + 7 = 7 + 8
What is the Commutative Property of Addition?
200
2,343; 3,343; 4,343; 5,343 Pattern: Adding ____
What is 1,000?
200
This tells you which operations to group in a number sentence.
What are parentheses?
200
Round to the greatest place. 634 + 788
What is 1,400?
200
387 + 251
What is 638?
300
(7 + 6) + 5 = (6 + 5) + 7
What is the Associative Property of Addition?
300
495, 505, 515, ___, ___, 545 Pattern: Adding ____
What is 525, 535, and 10's?
300
A number close to its actual value
What is an estimate?
300
Estimate by rounding to the nearest hundred to find the sum. 305 + 853
What is 1,200?
300
834 + 486
What is 1320?
400
This property states that you can change the order of the addends and still get the same sum.
What is the Commutative Property of Addition?
400
10 more than 723 100 more than 723 1,000 more than 723
What is 733, 823, 1,723?
400
The missing number or what you are solving for in a problem
What is the unknown?
400
Estimate by rounding to the nearest 100 to find the sum. 632 + 583
What is 1,200?
400
6,345 + 2,956
What is 9301?
500
This property states that the way in which addends are grouped does not change the sum.
What is the Associative Property of Addition?
500
1,000 more than 9,876 100 more than 9,876 10 more than 9,876 1 more than 9,876
What is 10,876; 9,976; 9,886; 9,877?
500

To rename a group of numbers as another number. Ex: To rename 10 ones as one 10.

What is regrouping (to regroup)?

500
Estimate by rounding to the nearest ten to find the sum. 578 + 409
What is 990?
500
7,895 + 3,647
What is 11,542?
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