What is the estimated value of the expression if each number in the expression is rounded to the nearest whole unit?
(4.18)(1.93)(8.72)

- anonymous

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- anonymous

@whpalmer4 Umm i got 0

- AlexandervonHumboldt2

use the calculator to do this. Or there is not permited to use it?
your answer is not correct if the sing between the ( ) is multiplication

- anonymous

ty

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## More answers

- whpalmer4

okay, if we round to the nearest whole unit, what are the rounded off values of 4.18, 1.93 and 8.72?

- anonymous

hmm

- whpalmer4

"nearest whole unit" means "nearest counting number"

- whpalmer4

"unit" <--> "1" in this context

- anonymous

Okay....let me think. Btw this is my worst topic ever

- whpalmer4

Have no fear, I'm here :-)

- anonymous

Okay :3 well........

- whpalmer4

4.18 - is that closer to 4, or 5?

- anonymous

4

- whpalmer4

very good. if we use my method from previous problem, we are rounding to the 1's place, so we add 0.5
4.18
+0.5
-----
4.68
drop everything after the place where we are rounding
4
our first number is (4)
how about the next two?

- anonymous

lol

- anonymous

this not the place for this

- anonymous

like u said;

- anonymous

There....now where were we?

- whpalmer4

Okay, so we had "simplified" our expression from
\[(4.18)(1.93)(8.72)\] to
\[(4)(1.93)(8.72)\]
but we still need to round the second two numbers before multiplying to get our estimate

- anonymous

Okay

- whpalmer4

what is the nearest counting number to 1.93?

- anonymous

2?

- whpalmer4

as an old math teacher of mine used to say when someone answered without conviction in their voice, "is that an answer, or a prayer?" :-)

- anonymous

Lol X'D 2

- whpalmer4

that's better! How about the third one?

- anonymous

9

- whpalmer4

correctamundo. so now we have which 3 numbers to multiply together?

- anonymous

uh 4*2*9

- anonymous

:_:

- whpalmer4

which equals...

- anonymous

=72

- whpalmer4

excellent! if we'd done the problem as originally stated, we would have 70.347728
so our estimate is pretty good, and a lot less work!

- anonymous

Thank you (:

- whpalmer4

you're welcome, of course

- anonymous

So it would be 70.347728 or do with take off some numbers?

- anonymous

70.34 O.O

- whpalmer4

No, the answer is 72. I'm just telling you what we would have gotten if we hadn't done an estimate, but instead multiplied the 3 original numbers in all of their magnificence :-)

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