Number and Operations in Base Ten

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Lesson 4

Estimate Sums and Differences

Practice

Estimate. Round each number to the nearest hundred.

1. 7,392

+ 4,112

2. 8,752

- 3,269

Need help? connectED.mcgraw-hill.comHomework Helper

Estimate $468 + $2,319. Round to the nearest hundred.

$468 rounds to $500 + $2,319 rounds to + $2,300 $2,800

So, $468 + $2,319 is about $2,800.

Estimate 55,599 - 22,782. Round to the nearest thousand.

55,599 rounds to 56,000 - 22,782 rounds to - 23,000 33,000

So, 51,599 - 22,782 is about 33,000.

Estimate. Round each number to the nearest thousand.

3. $5,486 + $8,602 4. 95,438 - 62,804

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Lesson 4 My Homework�83

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Problem SolvingEstimate. Round each number to the nearest hundred.

5. A total of 2,691 people attended the school play. A total of 1,521 people attended the band concert. About how many more people attended the play than the concert?

Estimate. Round each number to the nearest thousand.

6. The highest point in Texas, Guadalupe Peak, is 8,749 feet high. The highest point in California, Mount Whitney, is 14,497 feet high. About how much higher is Mount Whitney than Guadalupe Peak?

7. 2 Use Number Sense Maria’s school raised $23,240 in magazine sales and Cole’s school raised $16,502. About how much more money did Maria’s school raise?

Test Practice 8. Which is the correct estimate for 63,621 - 41,589

rounded to the nearest hundred?

A 22,040

B 22,000

C 20,000

D 22,032

84�Need more practice? Download Extra Practice at connectED.mcgraw-hill.com

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