Chapter 3 Review (3rd Grade)

Estimating Differences

100

Estimate to the nearest ten, then subtract:

839 - 426 = ?

840 - 430 = 410

413

200

Estimate to the nearest ten, then subtract:

933 - 281 = ?

930 - 280 = 650

652

300

Estimate to the nearest hundred, then subtract:

2,381 - 2,193 = ?

2,400 - 2, 200 = 200

188

400

Estimate to the nearest hundred, then subtract:

5,639 - 2,910 = ?

5,600 - 2,900 = 2,700

2,729

500

Estimate to the nearest hundred, then subtract:

7,432 - 3,974 =?

7,400 - 4,000 = 3,400

3,458

Subtract by 3-Digits

100

Subtract.

683 - 304

379

200

Subtract.

893 - 520

373

300

Subtract.

638 - 629

9

400

Subtract.

821 - 730

91

500

Subtract.

843 - 799

44

Subtract by 4-Digits

100

Subtract.

1,462 - 1,194

268

200

Subtract.

2,371 - 1,603

768

300

Subtract.

1,279 - 547

732

400

Subtract.

6,381 - 4,917

1,464

500

Subtract.

8,391 - 7,368

1,023

Subtract Across Zeros

100

Subtract (Box Method).

400 - 234

166

200

Subtract (Box Method).

700 - 562

138

300

Subtract (Box Method).

2,004 - 1,566

438

400

Subtract (Box Method).

5,003 - 1,993

3,010

500

8,000 - 5,792

2,208

Word Problems

100

At the county fair, a cookie stand makes fresh cookies everyday. On Friday, of the 6,000 cookies 4,892 were sold. How many cookies did the stand have left?

6,000 - 4,892 = 1,108

200

There are 746 books on the library shelves. 213 of them were checked out. How many books are still on the shelves?

756 - 213 = 533

300

In a container, there are 894 oranges. 560 were given to the grocery store. How many more oranges are in the container?

894 - 560 = 334

400

A building in Montvale measures 6,389 feet. The smallest building in Montvale measures 4,821 feet. What is the difference in feet between the two buildings?

6,389 - 4,821 = 1,568

500

Fieldstone has abut 2,000 students. Memorial has exactly 949 students (not really). How many more students does Fieldstone have than Memorial?

2,000 - 949 = 1,051