What is the meaning of estimate the sum?
The whole numbers are first rounded as specified, i.e., rounded to the nearest ten, hundred and so on.
Then the sum of the rounded whole numbers is found to estimate the sum of the whole numbers..
How do you estimate a number?
The general rule for estimating is to look at the digit to the right of the digit you want to estimate. Estimating or rounding to the nearest whole number means looking at the digit to the right of the decimal. If you see a digit greater than 5, round up, and if it’s less than 5, round down.
When should you estimate a sum or difference?
When you estimate, you find an answer that is close to the exact answer. You can round or you can use front-end estimation to estimate a sum or difference. Estimate the difference of 45,721 21,529. To use rounding, round each number to the nearest thousand.
What is the sum of a number?
The result of adding two or more numbers. Example: 9 is the sum of 2, 4 and 3. (because 2 + 4 + 3 = 9).
How do you estimate the sum?
Suppose you must add a series of numbers. You can round each addend to the nearest hundred to estimate the sum. Estimate the sum 1,472 + 398 + 772 + 164 by rounding each number to the nearest hundred. First, round each number to the nearest hundred.
How do you estimate the sum of two numbers?
Estimating a Sum. A quick way to estimate the sum of two numbers is to round each number and then add the rounded numbers. This probably won’t be the exact answer but it may be close enough for some purposes.