So for example:
Amy has 5,805 large beads and 3,950 small beads.About how many more large beads than small beads does Amy have?
How to do it:
5,805 rounds up to 6,000 because 805 is more than 500,500 because I am rounding up to thousands.
3,950 rounds up to 4,000 because 950 is more than 500,again 500 because I am rounding up to thousands.
So, you do 6,000+4,000=About 10,000 large beads
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he population mean
too great to calculate or unable to estimate
I think it means to do the work and then estimate it. But it could also be estimate the divisor and dividend and then do the work after those two numbers are estimated.
Estimate each difference means to estimate the numbers that they give you estimate means round to the nearest 10 like if 24 and you have to round it it will be 20 if the number is 25 which is in the middle than it will be the number upper which is 30
The variance of the estimate for the mean would be reduced.