Rounding is going to the nearest tens, hundreds, thousands etc., depending on the problem. Compatible numbers are numbers the work well with each other. Both of these are estimating.
It means that you round each number to one, one half, or zero
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
Compatible numbers would be easier. Rounding gives you 14 x 47. Compatible numbers could be 13 x 50 which would be closer to the actual product.
46.78-18.55 and estimate each sum or difference = 28.23
Suppose you are asked to evaluate a quotient like 923/462. You have several options. You could choose 900 and 500 as compatible numbers for the two given numbers and then your estimated quotient would be 900/500 = 1.8. Or You could choose 920 and 460 as the compatible numbers for them and then your estimated quotient would be 920/460 = 2.0. So the question is essentially, what compatible numbers did you pick and using them, what was the quotient. There is no correct answer to picking compatible numbers. Any estimation is a trade-off between simplicity and accuracy. Incidentally, a more accurate answer is 1.9978 (approx), but even that is not perfect!
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.
By rounding each of the numbers involved.
The numbers of protons in their nuclei, which are given by their atomic numbers.
Basically, the difference lie in the technology used. These two run on different frequencies and use different technologies which are not compatible with each other.
It is 21 and 9. Because you halve 30 to get 15, then add 6 to each to get the difference.
You cannot. The sum and difference cannot be the same for any pair of non-zero numbers.
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.
round off each of the numbers and add together: 114 + 257 is about 110 + 260 = 370. Exactly how you round off or approximate the numbers depends on how good you need the estimate to be.
n(n+1)/2 + 3Note that the difference between two consecutive numbers increases by one each time.
Compatible numbers are numbers that look friendly with each other when we do mental calculation to estimate a product or a quotient.So 420 would be an example for 419.Say I want to divide 419 by 2.I can do it easily for 420, it is 210But I increased 419 by 1 so I need to subtract half of 1 which is .5 and the answer is 209.5.I subtracted half or .5 since I increased 419 by 1 and I am dividing by 2.
Given a set of numbers, and its mean, we can find the difference between each of the numbers and the mean. If we take the mean of these differences, the result is called the mean deviation of the numbers.