Properties of Addition
6 + 0 = 6
What is the Identity Property of Addition?
1 more than 75
What is 76?
Doing math in your head.
What is mental math?
Estimate by rounding to the nearest 10.
75 + 12
80+10=
What is 90?
192 + 464
What is 656?
8 + 7 = 7 + 8
What is the Commutative Property of Addition?
2,343; 3,343; _____; 5,343 Pattern: Adding ____
What is the missing number
What is 1,000?
4,343
This tells you which operations to group in a number sentence.
What are parentheses?
Estimate to the greatest place.
634 + 788
600+800
What is 1,400?
387 + 251
What is 638?
(7 + 6) + 5 = (6 + 5) + 7
What is the Associative Property of Addition?
495, 505, 515, ___, ___, 545 Pattern: Adding ____
What are the missing numbers?
Adding 10
What is 525, 535?
A number close to its actual value
What is an estimate?
Estimate by rounding to the nearest hundred to find the sum. 305 + 853
300+900
What is 1,200?
834 + 486
What is 1320?
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?
10 more than 723; 100 more than 723; 1,000 more than 723
What is 733, 823, 1,723?
The missing number or what you are solving for in a problem
What is the unknown?
Estimate by rounding to the nearest 100 to find the sum. 632 + 583
600+600=
What is 1,200?
6,345 + 2,956
What is 9301?
This property states that the way in which addends are grouped does not change the sum.
What is the Associative Property of Addition?
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?
To use place value to exchange equal amounts when renaming a number.
What is regrouping (to regroup)?
Estimate by rounding to the nearest ten to find the sum. 578 + 409
580+410=
What is 990?
7,895 + 3,647
What is 11,542?