3rd Grade - Unit 1 Review

Rounding

100

Round 46 to the nearest 10

50

200

Round 345 to the nearest hundred.

300

300

Round 1568 to the nearest hundred.

1600

400

Round 438 to the nearest 10

440

500

Round 19368 to the nearest hundred.

19400

Place Value

100

Find the sum.

500+60+2

562

200

What is the value of the digit 3 in the number 371?

300

300

What is 358 in expanded form?

300+50+8

400

What is the value of the 7 in the number 279?

70

500

Find the sum.

1000+300+4

1304

Addition

100

Find the sum.

25+38=

63

200

Find the sum.

 352+138=

490

300

Find the sum.

678+345=

1023

400

Find the sum.

1472+539=

2011

500

Find the sum.

1659+3523=

5182

Subtraction

100

Find the difference:

68-42

26

200

Find the difference.

72-46=

26

300

Find the difference.

521-394=

127

400

Find the difference.

502-313=

189

500

Find the difference.

1732-845=

887

Estimating

100

What is the best estimate for 172+256?

170+260

200

What is the best estimate for 684-287?

680-290

300

Which number sentence has the same value as 456+412?

a) 450+410

b) 468+400

c) 400+582

b) 468+400

400

What is the best estimate for 543+206?

540+210

500

What is the best estimate for 623-489?

620-490