Question
There are 479 girls and 729 boys in a school. Estimate the total number of students in the school.
- 1200
- 1255
- 1300
- 1250
Hint:
We have to find the estimated total of students in school if number of girls is 479 and number of boys is 729. Firstly we will round off both number to nearest highest number place, in this question we will round off to nearest hundred. Further we will add both rounded number of boys and girls. the number obtained will be the estimated total of students in school.
The correct answer is: 1200
Rounding off the number of girls = 500
Rounding off the number of boys = 700
Total number of students
=500+700
=1200
So, the estimated total of students in school is 1200.
Related Questions to study
The difference of 587 and 222 using front -end estimation is ________.
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The sum of 730 + 450 using front – end estimation is______.
The sum of 730 + 450 using front – end estimation is______.
The number of students in Classes III, IV and V are 155,139 and 118. Estimate the total number of students in the three classes taken together.
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Estimate the sum of 5786 and 2126 to the nearest thousands.
Step 1 : Round Off ;
if last three digits are more than or equal to 500 round off to nearest thousand greater than number.
5786 rounds off to 6000.
if last three digits less than 500, then round off to nearest thousand smaller than number.
2126 rounds off to 2000.
Step 2 : Perform Addition
6000 + 2000 = 8000 ;
So , 8000 is our estimated sum .
Estimate the sum of 5786 and 2126 to the nearest thousands.
Step 1 : Round Off ;
if last three digits are more than or equal to 500 round off to nearest thousand greater than number.
5786 rounds off to 6000.
if last three digits less than 500, then round off to nearest thousand smaller than number.
2126 rounds off to 2000.
Step 2 : Perform Addition
6000 + 2000 = 8000 ;
So , 8000 is our estimated sum .
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Step 1 : Round off
If last 3 digits are less than 500 than round off to nearest 1000 less than the number .
so, 7123 rounds off to 7000 .
If last 3 digits are greater than or equal to 500 than round off to nearest 1000 greater than the number.
so, 3678 rounds off to 4000 .
Step 2 : On performing subtraction
7000 - 4000 = 3000 ;
So, 3000 is our estimated answer.
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Step 1 : Round off
If last 3 digits are less than 500 than round off to nearest 1000 less than the number .
so, 7123 rounds off to 7000 .
If last 3 digits are greater than or equal to 500 than round off to nearest 1000 greater than the number.
so, 3678 rounds off to 4000 .
Step 2 : On performing subtraction
7000 - 4000 = 3000 ;
So, 3000 is our estimated answer.
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