Rounding and Estimating Sums

What is 52 rounded to the nearest ten?

• 60

• 55

• 50

• 100

What is 238 rounded to the nearest ten?

• 200

• 300

• 230

• 240

What is 715 rounded to the nearest hundred?

• 720

• 800

• 700

• 710

What is the largest number that rounds down to 300 when rounding to the nearest 100?

• 400

• 350

• 349

• 250

ESTIMATE to find the sum, by rounding to the largest place values.

853,471 + 36,839

• 840,000

• 940,000

• 1,000,000

• 1,300,000

Round to the nearest hundred to estimate:
1,245 + 482

• 1,700

• 1,800

• 1,900

• 2,000

Round to the nearest ten thousand, then estimate the sum:

315,245 + 41,559

• 360,000

• 350,000

• 357,000

• 340,000

Round to the nearest thousand, then estimate the sum:

2,764 + 4,851

• 7,000

• 6,000

• 5,000

• 8,000

Round to the nearest hundred to estimate the sum of 432 + 348.

Hint: Stack your numbers!

• 600

• 700

• 800

• 900

There are 367 students in third grade and 158 in fourth grade. About how many more students are in third grade than fourth? 

• 600

• 300

• 520

• 200