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Properties of Addition
Addition and subtraction are related
(Blank)
Estimate by Rounding
Addition
200

Mario wrote this number sentence.

48+(15+5)=(48+5)+15

What property of addition did Mario model?

Associative Property of Addition

200

David found 556-323. His answer is 233. Show how can you check your answer?

  233

+323

______

   556

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

638?

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

Ramy found 384+215=599. How ca he check his answer? 

Subtract 599-215

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

Nora found 558-232. His answer was 326. Show how you can check the answer.

 326

+232

 _____

   558

500
To use place value to exchange equal amounts when renaming a number.
What is regrouping (to regroup)?
500
7,895 + 3,647
What is 11,542?
900

Sonia wrote a number sentence. What property or properties of addition are used?

24+(5+8)+0=(24+5)+8

Associative and Identity

900

Bob subtracted 334 from 758. How can he check his work using inverse operations?

 758

-544

_____

Add 214 to 544

900
Doing math in your head.
What is mental math?
900
Estimate by rounding to the nearest 10. 75 + 12
What is 90?
900

17+24+45

86

1000

Liza wants to find the sum of 85+45+19. What is the way she can find the sum using Associative Property.

85+(45+19)=149

1000

Raya found 540+125=665.How can she check her answer?

Subtract 665-125

1000
A number close to its actual value
What is an estimate?
1000
Estimate by rounding to the nearest hundred to find the sum. 305 + 853
What is 1,200?
1000

There were 67 brown eggs and 59 white eggs. All but only 25 eggs did not hatch. How  many eggs hatched? 

101