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Place Value
Rounding and Estimation
Addition
Subtraction
100

500 + 30 + 6 in standard form

536

100
Round 451 to the nearest ten and hundred.
450 and 500
100

305 + 27

332
100

754 - 53

701

200

Put in order from greatest to least: 264 246 264 240

264 260 264 240

200
Round 1,345 to the nearest ten and hundred.
1,350 and 1,300
200

310 + 78

388

200

810- 27

783

300

Compare: 998 ___ 989

>

300
Joe sold 145 cups of lemonade. Jim sold 218 cups of lemonade. About how many cups did the sell in all?
They sold about 300 (or 370) in all.
300

406 + 355

761

300

400 - 135

265

400

Write in word form: 8,527

eight thousand, five hundred twenty-seven

400

Bookshelf one has 449 books. Bookshelf two has 153 books. Bookshelf three has 398 books. About how many books are there in all?

There are about 1000 books in all.

400

_65 + 58 = 323

2

400

_61 - 84 = 477

5

500
Fill in the missing numbers 145, 135, 125, 115, ____, _____
105, 95
500

Mark had $1000. He spent $105 on a new TV. He also spent $479 on a new phone. About how much money does he have left?

He has about $400, but exactly $416 .

500

72 + 3_7 = 379

0

500

510 - 3_8 = 132

7