Question

Estimate the value of this expression by rounding each number to the nearest whole unit.

(1.94)(7.51)(3.74)

A.
56

B.
64

C.
42

D.
21

Answer 1

@SolomonZelman

Answer 2

first you have to find the product, and then we will do the estimation

Answer 3

so i have to times all three?

Answer 4

yes, you have to multiply all of those 3 terms:)

Answer 5

ok i will

Answer 6

i got 54.489556

Answer 7

so is it 56?

Answer 8

yes, now when you are rounding numbers:
generally (using \(\normalsize\color{royalblue}{ \approx }\) for approximately equals)

\(\normalsize\color{royalblue}{ 5.5\underline{5} \approx 5.6 }\)
\(\normalsize\color{blueviolet}{ 1.2\underline{6} \approx 1.3 }\)

rounded up.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

\(\normalsize\color{royalblue}{ 2.7\underline{4} \approx 2.7 }\)
\(\normalsize\color{blueviolet}{ 4.4\underline{2} \approx 4.4 }\)

rounded down.

Answer 9

when rounding:
\(\normalsize\color{blueviolet}{ 1,~2,~3,~4 }\) go to 0
\(\normalsize\color{blueviolet}{ 5,~6,~7,~8,~9 }\) go to ten

you are rounding to the tenth.

So, \(\normalsize\color{blueviolet}{ 54.4\underline{8} \approx ? }\)