Estimate using mental math and then calculate the exact sum or difference. Enter the exact sum or difference in the answer field.
4.817 + 9.099 + 17.008 =
484.603 − 48.198 =
To estimate the sum of 4.817 + 9.099 + 17.008, you can round each number to the nearest whole number:
4.817 ≈ 5
9.099 ≈ 9
17.008 ≈ 17
Now, add the rounded numbers:
5 + 9 + 17 = 31
To calculate the exact sum, you would add the original numbers:
4.817 + 9.099 + 17.008 = 31.924
So, the exact sum is 31.924.
To estimate the difference of 484.603 − 48.198, you can round each number to the nearest whole number:
484.603 ≈ 485
48.198 ≈ 48
Now, subtract the rounded numbers:
485 − 48 = 437
To calculate the exact difference, you would subtract the original numbers:
484.603 − 48.198 = 436.405
So, the exact difference is 436.405.
Estimate:
4.817 is very close to 5.0
9.099 is very close to 9.0
17.008 is SUPER close to 17.0
So ... 5 + 9 + 17 = what?
You can do the same for the second set of numbers.
Then simply do the addition (for the first) and subtracion (for the second).