7. Estimating Differences

What is a reasonable estimate of the difference between 8.99 and 5.18?

Round each number to the nearest whole number to estimate the difference:

54.6 - 12.9

Round each number to the nearest tenth to estimate the difference:

15.33 - 5.189

Round each number to the nearest hundredth to estimate the difference:

4.4555 - 0.333

Round each number to the nearest tenth to estimate the difference:

145.62 - 31.912

Round each number to the nearest whole number to estimate the difference:

4400.99 - 915.09

Round each number to the nearest hundredth to estimate the difference:

3.999 - 3.191

Round each number to the nearest thousandth to estimate the difference:

1.91344 - 0.025555

Mr. Dixon bought a whiteboard that was on sale for $1,989.99. The regular prices was $2,499.89. Which is the best estimate of the amount of money Mr. Dixon saved by buying the whiteboard on sale?

An airplane named Hawkeye flies 375.52 mph. An airplane named Foxbat flies 1,864.29 mph. About how much faster is the Foxbat than the Hawkeye? Round the decimals to the nearest whole number.

(a)