Addition
Subtraction
Rounding
Subtraction Across Zeros
Review
100

64 + 33

97

100

84 - 23

61

100

Round 234 to the nearest hundred

200

100

60 - 23

37

100

Write 1,593 in expanded form

1,000 + 500 + 90 + 3

200

432 + 285

717

200

341 - 262

79

200

Round 3,673 to the nearest thousand

4,000

200

500 - 347

153

200

Write two thousand six hundred fifty two in standard form (number name)

2,652

300

4,823 + 4,297

9,120

300

5,305 - 2,739

2,566

300

Round 6,742 to the nearest hundred

6,700

300

902 - 628

274

300

Write the following in standard form: 600,000 + 40,000 + 1,000 + 300 + 50 + 3

641,353

400

12,634 + 10,348

22,982

400

17,598 - 12,341

5,257

400

Round 14,684 to the nearest thousand

15,000

400

3,020 - 1,234

1,786

400
What operation should you use? Then solve:

The population of Huntington is 201,546. The population of Greenlawn is 14,598. The population of East Northport is 20,085. What is the total population of these three towns?

Addition - 236,229 
500

123,634 + 109,376

233,010

500

260,427 - 163,281

97,146

500
Estimate the sum: 634 + 235

800 or 830

500

10,305 - 2,452

7,853

500

What operation should you use? Then solve:

The total land area of New Jersey is 19,047 square kilometers. The Gates of Arctic in Alaska has a total land area of 34,287 square kilometers. How much more land does The Gates of Arctic have than New Jersey?

Subtraction - 15,240

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