3rd Grade Math Review

Rounding

100

What is 35 rounded to the nearest ten?

         

40

200

What is 40 to the nearest 100?

0

300

What is 110 to the nearest 100?

100

400

What is 149 to the nearest ten?

150

500

What is 689 to the nearest hundred?

700

Properties

100

What property is this?

53 + 0= 53

Identity

200

What property is this?

(12 + 5) - 2= 12 + (5 - 2)

Associative

300

What property is this?

5 + 4= 4 + 5

Commutative 

400

What property is this?

(14 + 2) + 10= 14 + (2 + 10)

Associative

500

What property is this?

(12 + 20) + 5= 5 + (20 + 12)

Commutative

Estimating Addition/ Subtraction

100

What is the estimate to the nearest ten?

52 + 36= 

50 + 40= 90

200

What is the estimate to the nearest 100?

569 + 432=

600 + 400=1,000

300

What is the estimate to the nearest hundred?

556 + 299=

600 + 300= 900

400

What is the estimat to the nearest ten?

432+ 322= 

430 + 320= 750

500

What is the estimate to the nearest ten?

951 + 432=

950 + 430= 1,380