Estimating Sums and Differences

237 fifth graders and 346 fourth graders went on a field trip. Estimate how many more fourth graders were on a field trip than fifth graders.

• 200 more
• 109 more
• 100 more
• 110 more

Eastfield college has 1,537 students. Richland college has 2,785. Rounding to the HUNDREDS place, approximately how many fewer students does Eastfield college have than Richland college.

• 1,300
• 1,200
• 1,100
• 1,500

If you have 382, you might say you have ABOUT...

• 400
• 390
• 450
• 350

If you have 819, you might say you have approximately...

• 900
• 880
• 820
• 810

Mr. Smith drove 1,380 miles in the month of August and 656 miles in the month of September. Approximately how many miles did he drive all together.

• 2,000.
• 2,100.
• 2,036.
• 2,500.

Mrs. Krutak used 1,820 pencils last year. This year she thinks she will use 1,932 pencils. About how many pencils is that all together?

• 3,000.
• 3,700.
• 4,000.
• 3,752.

Caleb has 5,233 books. Elizabeth has 2,354 books. Estimate how many fewer books Elizabeth has?

• 2,900.
• 3,000.
• 2,879.
• 2,870.

If you were estimating 8,964 + 825, what would be the best place value to round to?

• Thousands
• Hundreds
• Tens
• Don't round at all.

If you were deciding about how much 1,235 - 58 equaled to, which place value would you round to?

• Tens
• Hundreds
• Thousands
• Tenths

Approximately how many students went on the field trip to Washington, DC?
DC VISITORS
7th Graders      4,945.
8th Graders      5,623.
9th Graders      1,989.

• 12,557.
• 13,000.
• 12,600.
• 12,400.