Show:
Properties
Sum
Difference
Estimating
Finding the Unknown
100

Which property does this equation represent?

3 + 2 = 2 + 3

Commutative

100

312 + 478 = ?

790

100

50,000 - 24,537 = ?

25,463

100

Round to the nearest thousand to estimate the sum of 2,378 + 6,709

9,000

100

(17 + 16) + _____ = 64

31

200

Which property does this equation represent?

0 + 8 = 8

8 + 0 = 8

Identity

200

267,894 + 1,000 = ?

268,894

200

$4,826 - $1,270 = ?

$3,556

200

Round to the nearest hundred to estimate the difference of 2,187 - 1,549

700

200

Find the unknown

253 + _____ = 561

308

300

Which property does this equation represent?

2 - 0 = 2

2 - 2 = 0

Subtraction Rule

300

69 + 54 = ?

123

300

4,502 - 340 = ?

4,162

300

Round to the nearest hundred to estimate the sum of 2,356 + 371

2,800

300

Find the unknown.

(34 + 51) + ____ = 95

10

400

Which property does this equation represent?

(1 + 7) + 2 = 1 + (7 + 2)

Associative

400

3,350 + 1,209 = ?

4,559

400

112,672 - 69,370 = ?

43,302

400

Round to the nearest ten to estimate the difference of 3,678 - 2,131

1,550

400

34,762 + ____ = 34,862

100

500

Ms. Meyer ate 12 slices of pizza on Friday (don't judge!) and 8 slices on Saturday. Which equation shows the same sum using the Commutative Property?

A. 12 + 8 = 8 + 12

B. 12 + 8 = 12 + 12

C. 12 + 8 = 20 + 8

A. 12 + 8 = 8 + 12

500

24,153 + 2,310 = ?

26,463

500

99,500 - 53,967 = ?

45,533

500

Estimate to the nearest hundred how many steps Ms. Meyer took on Sunday and Monday altogether. (Yes this is true)

6,872 + 8,233

15,100

500

548 - _____ =208

340