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

Use compatible numbers to estimate the value of 76 + 26.

• 75 + 25 = 100.

• 80 + 30 = 110

• 76 + 26 = 102

• 70 + 20 = 90

Round to the nearest hundred, then estimate the sum:

123 + 456

• 580

• 600

• 650

• 500

Subtract 432 from 789. What is the difference?

• 512

• 357

• 245

• 678

When subtracting 743 from 986, how many hundreds need to be regrouped?

• 5

• 1

• 3

• 7

Find the total when 523 and 367 are added together.

• 456

• 890

• 8900

• 1000

If you have 845 and you subtract 279, what is the answer?

• 566

• 934

• 712

• 368

Subtract 432 from 789. What is the difference?

• 512

• 357

• 245

• 678

What is the sum of 345 and 278?

• 423

• 567

• 623

• 512