Rounding

Addition

Subtraction

Word Problems

True or False

100

Round this number to the nearest *tens.*

*34*

30

100

324 + 97

421

100

72 - 15

57

100

Some students at Coyote Hills had a book reading contest. The 3rd graders read 682 books and the 4th graders read 458 books. How many more books did 3rd grade read than 4th grade?

224 books

100

590 -204 = 386

True

200

Round this number to the nearest *ten.*

*278*

280

200

Which two numbers have the *closest *sum to 500? (pick 2 answers!)

a) 230

b) 310

c) 170

b and c

310 and 170 = 480

200

182 -117

65

200

Ronald has 334 baseball cards. Nick has 201 baseball cards. How many cards do they have in all?

535

200

Jack is given the following problem: 234 + 678. After rounding, he says the answer will be around 800 because 200+600=800. Is this true or false?

False. The rounded number would be 900

300

Round this number to the nearest *hundreds*.

851

900

300

653 + 279

932

300

363-94

269

300

Leo's book has 327 pages. He's read 121 pages so far. How many pages does he have left?

206 pages

300

True or false?

299 -165 = 140

False

400

Round this number to the nearest *hundreds*.

539

500

400

Which two numbers have the closest sum to 1,00?

a) 560

b) 400

c) 442

a and c

560 + 442 = 1,002

400

462 - 18

444

400

All of the 3rd grade classes put on a play at school. 240 people came to the first show and 154 people came to the second show. How many people came to see the show?

394 people

400

If I'm trying to solve this problem: 464 + 721, I can round the numbers to add 500 + 700. True or false?

True

500

Round this number to the nearest *hundreds*.

2,461

2,500

500

234 + 182

416

500

253 + __ = 500

247

500

There are 137 kindergarteners, 139 first graders, and 153 second graders at Crescent Elementary School. How many students are there in all?

429 students

500

True or False?

123-109 = 122-110

False