Maths-
General
Easy
Question
The sum of 730 + 450 using front – end estimation is______.
- 1000
- 1100
- 1200
- 1300
Hint:
The first-end estimation of a number means rounding off the number to the nearest hundred/tens/thousands whatever be the place value of the leading digit.
The correct answer is: 1100
Here, we are required to find the sum of 730 and 450 using front-end estimation.
Firstly, we see the place value of the leading digit in both the numbers. The place value of 7 in 730 is hundreds and the place value of 4 in 450 is also hundred. So, we round off both the number to nearest hundred.
For 730,since the tens place digit, 3 is less than 5. So, we have to round down.
So, 730 rounded down gives 700.
Now for 450, since the tens place digit is 5. So it has to be rounded up.
So, 450 rounded up gives 500.
Now, we have
730 + 450
=700 + 500
=1200
Hence the correct answer is C
Front-end estimation means rounding off a number to the nearest place value of the leading digit of the number.
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