Rounding
Estimating
Subtraction
Addition
Wild Card
100

Round 55 to the nearest ten.

60

100

Estimate the sum of 65 and 89 by rounding to the nearest ten.

160

100

Subtract 50-24

26

100

Add 123 + 456

579

100

A school library has 3,730 books in French, 2,531 books in English, and 5,368 books in other languages. How many books does the library have in English and French?

6,261

200

Round 176 to the nearest hundred

200

200

Estimate the sum of 456 + 760 by rounding to the nearest hundred.

1,300

200

Subtract 450-123

327

200

Add 983+125

1,108

200

In a city, there are 45,960 electric cars and 96,113 gas cars. There are about ________ more gas cars than electric cars.

50,000

300

Round 1,657 to the nearest ten

1,660

300

Estimate 450 + 610

1,100

300

Subtract 9,487-5,256

4,231

300

2,450+3,678

6,128

300

Find the rule in the pattern: 1,203 ; 1,624 ; 2,045 ; 2,466

add 421

400

Round 145,708 to the nearest hundred

145,700

400

Estimate the sum of 12,100 + 14,900

27,000

400

Subtract 12,340 - 11,231

1,109

400

12,456+345

12,801

400

Write the number in three different forms: 104,612

Word form: one hundred four thousand six hundred twelve

Standard form: 104,612

Expanded form: 100,000 + 4,000 + 600 + 10 + 2

500

Round 145,708 to the nearest thousand

146,000

500

Estimate the sum of 125,760 + 112,356 by rounding to the nearest thousand.

238,000

500

Subtract 456,706 - 125,509

331,197

500

678,335 + 123,045

801,308

500

There are about 310 passengers in each car of the city train. As there are 8 cars for each train, there are about ________ passengers on each train.

2,400