Review
Estimation Word Problems
Find the Sum
Find the Difference
Subtracting Across Zeros
100

189 written in expanded form

100 + 80 + 9

100

Cooper spent $245 at the book fair. Mackenzie spent $189. Estimated to the nearest hundred, about how much did Cooper and Mackenzie spend at the book fair together?

200 + 200 = $400

100
4,461 + 2,124 =
What is 6,585
100

7,769 - 3,435 =

What is 4,334

100

600 - 177

423

200

What is the digit in the thousands place: 16,345

6

200

Falls lake has lots of different fish living in it. There are 596 bass, 611 flounder, and 1,089 catfish. About how many more catfish are there than flounder rounded to the nearest HUNDRED?

1100 - 600 = 500 fish

200
112,450 + 53,476 =
What is 165,926
200

98,600 - 54,587 =

What is 44,013

200

810 - 638

172

300

The value of the digit in the hundreds place: 53,636

600

300

East Carolina University has 28,499 students. NC State University has 31,569 students. About how much bigger is the student population at NC State University than East Carolina University rounded to the nearest THOUSAND?

32,000 - 28,000 = 4,000 students

300
Round to the nearest hundred to estimate the sum of 1,245 + 482 =
What is 1,700
300

112,672 - 69,370 =

What is 43,302

300

3,304 - 1,137

2167

400

5,643 rounded to the nearest hundred

5,600

400

Estimate the sum total of the following numbers to the nearest HUNDRED: 536 + 695

500 + 700 = 1200

400
3,350 + 1,209 =
What is 4,559
400

99,543 - 53,967 =

What is 45,576

400

5,025 - 178

4847

500

17,943 rounded to the nearest ten-thousand

20,000

500

Statistically, thus far, there have been 1815 shark attacks in the USA, 1118 shark attacks in Australia, and 537 shark attacks in Africa. About how many more shark attacks have there been in the USA than Australia AND Africa together to the nearest HUNDRED?

500 + 1100 = 1600

1800-1600=200 shark attacks

500

24,153 + 2,310 =

What is 26,463

500

911,823 - 12,345

What is 899,478

500

7,006 - 3,529

3477