Its approximate calculation.
You round up or down and leave one significant figure on all numbers in the calculation.
Say its 2354 * 128
So: 2000 * 100 = 200000
by adding or subtracting the values of the digits in the front place
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an estimating technique in which the front digits of the addends are added and then the sum is adjusted for a closer estimate
2,000. A front-end estimation just means to round it by the greatest value, in this case the thousands.
Front-end estimation is a technique used in mathematics to quickly estimate the sum or difference of numbers by rounding the leading digits (the leftmost digits) to their nearest whole number. For example, in estimating 47 + 38, one might round to 50 + 40, resulting in an estimated sum of 90. Back-end estimation, on the other hand, focuses on the last digits, rounding them and then adjusting based on the context; for instance, when estimating 47 + 38, one might use 7 + 8 to estimate the last digits and then add 80 from the front-end estimation, leading to a final estimate of 90. Both methods provide a quick way to gauge the accuracy of calculations without precise arithmetic.
A front end estimate is 900.
by adding or subtracting the values of the digits in the front place
To the nearest integer, 474
To the nearest integer, 1
Front end estimation generally produces a better estimate of sums or differences than rounding before adding or subtracting. How to Estimate a sum by front end estimation * Add the digits of the two highest place values * Insert zeros for the other place values * Example 1: 4496 + 3745 is estimated to be 8100 by front end estimation (i.e. 4400 + 3700). * Example 2: 4496 + 745 is estimated to be 5100 by front end estimation (i.e. 4400 + 700).
23
10.91
Front end estimation- An estimation method in which the front digits are added or subtracted
One way is to do front end estimation!
8 + 11 = 19
8000 + 3000 = 11000
The front end estimate is 700 + 1000 = 1700.