Rounding for Addition and Subtraction

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. (hint: you need to subtract!)

• 200 more

• 500 more

• 300 more

• 100 more

Estimate the sum of 57+99 by rounding to the nearest tens

• 140

• 160

• 150

• 170

Estimate the difference of 412 - 257 by rounding to the nearest hundreds

• 250

• 150

• 200

• 100

A museum has 237 works of art on the first floor. The second floor has 349 works of art. About how many works of art in all? (Use rounding to the greatest place value.)

• 600

• 500

• 400

• 586

Estimate the answer by rounding to the nearest tens.

506 + 397

• 900

• 800

• 910

• 903

Subtract the following numbers by rounding to the nearest 100

756 - 549 =

• 400

• 300

• 200

• 100

what is the estimated difference for

786 - 245 ( Round to the nearest tens )

• 540

• 600

• 500

• 541

Round 247 039 to the nearest thousand.

• 200 000

• 250 000

• 247 000

• 7 000

A type of estimation with specific rules for determining the closest value

• rounding

• sum

• estimation

• profit