Rounding and Estimating Sums

There are 293 steps to the top of the Leaning Tower of Pisa in Italy.  To the nearest hundred, about how many steps are there?

• 200

• 300

• 290

• 250

Which of these numbers does NOT round to 50 when rounded to the nearest 10?

• 55

• 45

• 51

• 47

Estimate the sum: 35 + 44 =

• 90

• 79

• 70

• 80

Round to the nearest 100 to estimate the difference:

510 - 396 =

• 200

• 300

• 100

• 400

Select 2 numbers that round to 100 when rounded to the nearest 10.

• 96

• 102

• 110

• 107

What is 87 rounded to the nearest hundred?

• 100

• 0

• 90

• 80

Estimate: 18 + 53

• 70

• 71

• 60

• 80

Estimate: 37 + 52

• 80

• 90

• 89

• 100

Estimate to the nearest hundred: 642 + 212

• 800

• 900

• 850

• 854

Estimate to the nearest hundred: 109 + 688

• 700

• 750

• 800

• 900