Mathematics

Grade-3-

Easy

Question

# Estimate the difference between 7123 and 3678 to the nearest thousands.

- 2000
- 1000
- 3000
- 4000

Hint:

### First of all round off the number to nearest thousand and then perform subtraction.

## The correct answer is: 3000

### 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 .

On performing subtraction

7000 - 4000 = 3000;

So, 3000 is our estimated answer.

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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