Rounding to the Nearest 10
Rounding to the Nearest 100
Name the Addition Property
Find the Halfway Number
Fact Family
100

Round 92 to the nearest 10.

90
100

Round 418 to the nearest 100.

400
100

(6 + 7) + 2 = 6 + (7 + 2) 

Associative Property of Addition

100

What is the halfway number between 30 and 40?

35

100

What is the fact family for these three numbers?

3, 4 , 7

3 + 4 = 7

4 + 3 = 7

7 - 4 = 3

7 - 3 = 4

200

Round 67 to the nearest 10.

70

200

Round 734 to the nearest 100.

700

200

 98 + 0 = 98

Identity Property of Addition (also called the Zero Property of Addition)

200

What is the halfway number between 70 and 80?

75

200

What is the fact family for these three numbers?

6, 11, 5

5 + 6 = 11

6 + 5 = 11

11 - 5 = 6

11 - 6 = 5

300

Round 341 to the nearest 10.

340

300

Round 655 to the nearest 100.

700

300

6 + (5 + 8 ) = (6 + 5) + 8

Associative Property of Addition

300

What is the halfway number between 800 and 900?

850

300

What is the fact family for these three numbers?

14, 9, 5

5 + 9 = 14

9 + 5 = 14

14 - 9 = 5

14 - 5 = 9

400

Round 978 to the nearest 10.

980

400

Round 1, 772 to the nearest 100.

1, 800

400

4 + 3 = 3 + 4

Commutative Property of Addition

400

What is the halfway number between 1, 000 and 2,000?

1, 500

400

What is the fact family for these three numbers?

20, 50, 30

20 + 30 = 50

30 + 20 = 50

50 - 20 = 30

50 - 30 = 20

500

Round 3, 112 to the nearest 10.

3, 110

500

Round 4,831 to the nearest 100.

4, 800

500

1, 208 + 45 = 45 + 1, 208

Commutative Property of Addition

500

What is the halfway number between 

9,000 and 10, 000?

9, 500

500

What is the fact family for these three numbers?

500, 100, 400, 

400 + 100 = 500

100 + 400 = 500

500 - 100 = 400

500 - 400 = 100

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