Rounding and Estimating Sums

What is 52 rounded to the nearest ten?

• 60

• 55

• 50

• 100

What is 715 rounded to the nearest hundred?

• 720

• 800

• 700

• 710

Round to the nearest 100 to estimate the difference:

510 - 396 =

• 200

• 300

• 100

• 400

A museum has 237 works of art on the first floor. The second floor has 349 works of art. The third floor has 219 works of art. About how many works of art in all?

• 800

• 700

• 750

• 660

Seth bought a pair of sneakers for $48 and a jacket for $64. Estimate the total amount that he spent for the sneakers and jacket

• $112

• $100

• $110

• $120

Mr. Avery’s class made $118 for the fundraiser. Mrs. Bolero’s class made $189 for the fundraiser. Which of these statements shows the best estimate of the total amount both classes raised?

• $100 + $200 = $300

• $125 + $150 = $275

• $100 + $100 = $200

• $200 + $200 = $400

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

Estimate the value of 76 + 26.

• 70 + 25 = 95.

• 80 + 30 = 110
• 76 + 26 = 102
• 70 + 20 = 90

Jill took 32 minutes to complete math homework and 16 minutes to complete reading. Estimate how many minutes did Jill use for homework?

• 48 minutes

• 50 minutes

• 55 minutes

• 40 minutes

• 490 - 350 = 140

• 488 - 351 = 137

• 480 - 350 = 130

• 500 - 400 = 100