Mathematics
Grade-3-
Easy

Question

Estimate the sum of 7300 + 5315 nearest to hundred and then check that the answer is reasonable or not. 

  1. reasonable  
  2. not reasonable
  3. undefine  
  4. not possible

hintHint:

First round off the numbers to nearest  hundredths and then Perform Simple addition.

The correct answer is: reasonable  


Step 1 : Round Off ;

if last 2 digits more than or equal to 50 round off to nearest hundred greater than number.

if last 2 digits less than 50 round off to nearest hundred smaller than number.

5315 rounds off to 5300.

7300 rounds off to 7000.

Step 2 : Perform Addition 

5300 + 7000 = 12,300 ;

12300 is very close to actual sum with a difference of less than 1% so it is , reasonable.

 

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