Rounding and Estimation
Addition and Subtraction
Multiplication
100

Round 650 to the nearest hundred.

700

100

449-373

80

100

Rewrite using the distributive property 20(4+7)

20(4) + 20(7)

200

What place is the 5 in 43,526,000?

hundred-thousands

200

799 + 1655 + 271

2725

200

8 x 0 x 9

0
300

Round 6,999,000 to the nearest one hundred-thousands.

7,000,000

300

What is the perimeter of a rectangle with two sides that equal 8 and two sides that equal 4?

24

300

79 x 3

237

400

Estimate the sum or difference by rounding to the nearest thousand

849+23370+43+2501

27,000

400

What is the difference of 51,111 and 19,898?

31,213

400

91 x 72

6552

500

What is the largest number that can be rounded to 3700?

Hint:  It is larger than 3700.  Remember, you are rounding to the nearest 100.

3749

500

When a couple began a trip, the odometer read 55,492.  When the trip was over, the odometer read 59,320.  How many miles did they drive on the trip?

3828 miles

500

807 x 127

102,489