Use front-end estimation to estimate the sum to the nearest whole number.
13.40+36.63+125.042
How do I solve this question?
Front end estimation adds only the first digits.
13 + 36 + 125 = ?
To estimate the sum using front-end estimation, you will round each number to the nearest whole number by only considering the digits in the front of the decimal point. Then, you add up these rounded values to get the estimated sum.
Let's break down the estimation for each number:
1. 13.40: We can round this number to 10 because the digit immediately after the decimal point is less than 5. Therefore, we replace 13.40 with 10 in our estimation.
2. 36.63: We can round this number to 40 because the digit immediately after the decimal point is equal to or greater than 5. Therefore, we replace 36.63 with 40 in our estimation.
3. 125.042: We can round this number to 130 because the digit immediately after the decimal point is equal to or greater than 5. Therefore, we replace 125.042 with 130 in our estimation.
Now, we can add up the rounded values to get the estimated sum:
10 + 40 + 130 = 180
The estimated sum, rounded to the nearest whole number, is 180.