Question

Which of these is the best estimate of the value of 4.382×2.641×6.438 ?
A 48
B 72
C 90
D 105

Answer 1

Do you know how to round numbers to the nearest whole number?

Answer 2

If the decimal if over .5 than you round up.
If it is lower than .5 than you round down.

Answer 3

So,
\[4.382 \approx 4\]
\[2.641 \approx 3\]
\[6.438 \approx 6\]

Which means:
\[4 \times 3 \times 6 = ?\]

Solve that to get your answer ^

Answer 4

It's B.