Properties
Finding Unknowns
Find the Sum
Find the Difference
Word Problems/Vocab
100
What property tells us that the order of the numbers does not change the value of the sum?
What is the Commutative Property of Addition
100
78 + 34 = _______
What is 112
100
4,461 + 2,124 =
What is 6,585
100
7,769 - 3,435 =
What is 4,334
100

An _____________is an answer close to the exact answer.

estimate

200
What property tells us that adding 0 to a number equals the number?
What is Identity Property of Addition.
200
123 + _____ = 175
What is 52
200
112,450 + 53,476 =
What is 165,926
200
98,600 - 54,587 =
What is 44,013
200

Ford has 567 glass marbles. He has 267 plastic marbles. He gave 132 plastic marbles to his brother. How many total marbles does Ford have?

What is 567 + 267 - 132 =702

300
Which property tells us that the way in which the numbers are grouped does not change the value of the sum?
What is the Associative Property of Addition
300
(26 + 32) + ______ = 127
What is 69
300
Round to the nearest hundred to estimate the sum of 1,245 + 482 =
What is 1,700
300
112,672 - 69,370 =
What is 43,302
300

The zoo had 763,490 visitors the first year and 546,708 visitors the next year. How many more visitors did the zoo have during the first year than the second year?

What is 763,490 - 546,708 = 216,782

400
6 + 3 = 3 + 6 is an example of what property?
What is Commutative Property of Addition
400
76,912 + ______ = 77,912
What is 1,000
400
3,350 + 1,209 =
What is 4,559
400
99,500 - 53,967 =
What is 45,533
400

There were 87,000 people at the concert. Of those people, 9,478 got free tickets. How many people had to pay for their tickets?

What is 87,000 - 9,478 = 77,522

500
2 + (5 + 9) = (2 + 5) + 9 is an example of what property?
What is the Associative Property of Addition.
500
124,567 + 100 = ______
What is 124,667
500
24,153 + 2,310 =
What is 26,463
500
900,000 - 12,345
What is 887,655
500

To change the value of a number to one that is easier to work with is to ______________.

round

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