4th Grade Unit 1 Review

Rounding

100

Round 56 to the nearest ten.

60

200

Round 382 to the nearest ten

380

300

Round 4,591 to the nearest thousand.

5,000

400

When you round a number, which digit in the number helps you decide to round up or down?

The digit to the right of the place you are rounding

500

The digit to the right of the place you are rounding has to be larger than what number to round up?

5

Subtraction

100

45-29

16

200

320-129

191

300

3,241 - 3,192

49

400

24,548 - 6,299

18,249

500

149,933 - 52,651

97,282

Expanded Form

100

Write the number 63 in expanded form.

60 + 3

200

Write the number 724 in expanded form.

700 + 20 + 4

300

Write the number three hundred fifty-five in expanded form.

300 + 50 + 5

400

Write the number 60,329 in expanded form.

60,000 + 300 + 20 + 9

500

Write the number four hundred sixty-three thousand, two hundred ninety nine in expanded form.

400,000 + 60,000 + 3,000 + 200 + 90 + 9

Estimation

100

Estimate the sum of 12 + 10

20

200

Estimate the sum of 63 + 72

130

300

Estimate the sum of 2,041 + 996

3,000

400

Estimate the sum of 524 + 691

1200

500

Estimate the sum of 10,921 + 3,421

14,000

Comparisons

100

Compare using <, >, or =

95 and 59

95 >59

200

Compare using <, >, or =

321 and 312

321 > 312

300

Compare using <, >, or =

2,439 and 2,493

2,439 < 2,493

400

Compare using <, >, or =

9,021 and 9,121

9,021 < 9,121

500

Compare using <, >, or =

625,834 and 625,386

625,834 > 625,386