use compatible numbers to estimate each difference 84-36
54+86
2.0999999999999996
In arithmetic, estimate usually means rounding the numbers so they're easier to manipulate. Example: Estimate the sum of 432 and 267. You can round them to 430 and 270 and estimate the sum as 700. You could also round them to 400 and 300 and estimate the same total. To estimate a difference, just subtract them. 430 minus 270 is 160. The actual sum is 699 and the actual difference is 165, so your estimates came pretty close.
77
956
use compatible numbers to estimate each difference 84-36
54+86
2.0999999999999996
In arithmetic, estimate usually means rounding the numbers so they're easier to manipulate. Example: Estimate the sum of 432 and 267. You can round them to 430 and 270 and estimate the sum as 700. You could also round them to 400 and 300 and estimate the same total. To estimate a difference, just subtract them. 430 minus 270 is 160. The actual sum is 699 and the actual difference is 165, so your estimates came pretty close.
7.000
46.78-18.55 and estimate each sum or difference = 28.23
An estimate is an educated guess. Approximate and round off mean "about".
77
To estimate the difference, you find the difference first. To find the difference, you subtract the numbers you are given. Then you estimate your final answer (the difference).
An estimate for the mean of a set of observations is just that - an estimate. Another set of observations will give a different estimates. These estimates for the mean will have a distribution which will have a standard error. If you have two sub-populations, the mean of each sub-population will have a standards error and the se of the difference between the means is a measure of the variability of the estimates of the difference.A typical school work example: the heights of men and of women. There will be a mean height for men, Hm, with a se for men's heights and a mean height for women, Hw, with its own se. The difference in mean heights is Hm - Hw and which will have an estimated se.
Sum is the result of an addition problem, while difference is the result of a subtraction problem. Addend Subtractend + Addend - Subtractor Sum Difference