Power of Ten and Rounding

3.86 x 10³

• 3.86000

• 386

• 3860

• 38600

10²₌

• 100

• 1,000

• 20

• 0.01

What is the meaning of 10³?

• 10 x 3

• 10 + 10 + 10

• 10 + 3

• 10 x 10 x10

What is the value of the following expression? 7893÷ 10³

• 7.893

• 7893000.0

• 0.0007893

• 789.3

• a

• b

• c

• d

Round 1,457 to the nearest hundred is (a)   .

• 1,500

• 1,450

• 1,550

• 1,600

Which numbers are rounded correctly? Choose ALL the correct answers.

• 444 rounded to the nearest ten is 440.

• 361 rounded to the nearest hundred is 400.

• 547 rounded to the nearest hundred is 500.

• 255 rounded to the nearest ten is 250.

Lorelai is planning a visit to Boston. The table shows how many miles Sally will drive on various days of her trip. She estimated that she will drive less than 1,200 miles on her trip there. Is Lorelai's estimate correct?

• No, because the number of miles rounded is greater than her estimate.

• Yes, because the number of miles rounded is less than her estimate.

Match the following:

Round the numbers!

• 40

• 43

• 800

• 743

• 600

• 631

• 700

• 984

• 1000

• 795

Rounding means...

• finding the exact answer.

• always making a number smaller.

• always making a number bigger.

• making a number simpler, but keeping its value closer to what it was.