Properties of Addition
Find the sum. Identify the addition property. 156 + 0
What is 156; the Identity Property of Addition?
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?
Estimate by rounding to the nearest 10. 75 + 12
What is 80 + 10 = 90?
Use any strategy to solve each problem. Donna bought a dog for $1,567 and a cat for $3,438. Is it reasonable to say she paid about $5000 for both the dog and cat?
What is Yes, I rounded each addend and got the estimate of $5,000? $1,600 + $3,400 = $5,000
Find the sum. Identify the property. 59 + 27 = 27 + 59
What is 86; the Commutative Property of Addition?
2,343; 3,343; 4,343; 5,343 Pattern: Adding ____
What is 1,000?
Round to the greatest place. 634 + 788
What is 600 + 800 = 1,400?
The ice cream shop is trying to decide which flavor is most popular. This week they sold 78 strawberry scoops, 87 chocolate scoops, and 47 vanilla scoops. How many scoops did they sell altogether?
What is (78 + 87) + 47 = 212 scoops?
Find the sum. Identify the property. (7 + 9) + 5 = (9 + 5) + 7
What is 21; the Associative Property of Addition?
495, 505, 515, ___, ___, 545 Pattern: Adding ____
What is 525, 535, and 10's?
A number close to its actual value
What is an estimate?
Estimate: Round each addend to the indicated place value. (hundreds) 305 + 853
What is 300 + 900 =1,200?
Marcia takes riding lessons at a stable with 2 horses. Each horse needs a saddle, 2 feeding bags, and 4 horseshoes. How many items are needed for all of the horses?
What is (2 + 4) + 8 - 14 items?
Find the sum. Identify the property. 7 + (8 + 2) = (7 + 8) + 2
What is 17; the Associative Property of Addition?
10 more than 723
100 more than 723
1,000 more than 723
What is 733, 823, 1,723?
This property states that the way in which addends are grouped does not change the sum.
What is the Associative Property of Addition?
Estimate: Round each addend to the indicated place value. (tens) 632 + 83
What is 630 + 80 = 710?
Raina walked her dog for 52 minutes on Thursday, 46 minutes on Saturday, and 36 minutes on Sunday. About how many minutes did Raina walk her dog?
What is about 50 + 50 + 40 =140 minutes?
Find the sum. Identify the property. 89 + 57 = 57 + 89
What is 146; the Commutative 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 rename a number using place value
What is regrouping (to regroup)?
Estimate by rounding to the nearest ten to find the sum. 578 + 409
What is 580 + 410 = 990?
Carson earns $100 a month. In August, Carson managed to save $73 of his $100. In September, he saved $15. How much money did he save over the two months?
What is $73 + $15 = $88?