Question

follow principles of estimation to find an approximate value.
round each number so that there is one nonzero digit do not find the exact value
12 Division 493,867
I believe you round down the 12 to 10
is the 493,867 rounded up or down please
thanks in advance

Answer 1

they want only one non-zero digit, which means you will change
493,867 to the either 400,000 or 500,000
you should pick the one that is nearest to 493,867

Answer 2

so with the 3rd digit below 5 it should be brought down to 400,000

Answer 3

in general, you would look at the digit to the right of the 4... in this case the 9
if that digit is 5 or more, round up. 9 is bigger than 5, so round 4 up to 5
the rounded number is 500,000

Answer 4

ok that makes sense

Answer 5

you could write 493,867 as
400,000 + 93,867
notice that 93,867 is getting close to 100,000 (you are only 6,133 away)
so this is close to 400,000 + 100,000 = 500,000

Answer 6

***so with the 3rd digit below 5 it should be brought down to 400,000***
you look at the 2nd digit in, not the 3rd digit.

Answer 7

great explanation thank you

Answer 8

yw

Answer 9

is the problem to estimate
12/493,867
?

Answer 10

the reason I asked is because there is a difference between
10/500,000 = 1/50,000 (a tiny number)
and
500,000 / 10 = 50,000 (a big number)