Estimate the sum of 4.768 and 3.945.
Answer (1)
To estimate the sum of 4.768 and 3.945, we round each number to the nearest whole number and then add them together.
Round 4.768 :
When rounding to the nearest whole number, look at the digit in the tenths place.
The tenths digit is 7, which is 5 or above, so we round up.
Therefore, 4.768 rounds to 5.
Round 3.945 :
Again, look at the tenths place.
The tenths digit is 9, which is 5 or above, so we round up.
Therefore, 3.945 rounds to 4.
Add the rounded numbers :
Combine the rounded numbers: 5 + 4 .
The estimated sum is 9 .
Therefore, the estimated sum of 4.768 and 3.945 is approximately 9.
