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Question

Substract 4560 from 65430 after rounding them off to the nearest hundred.

A
60,800
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B
60,700
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C
60,900
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D
60,600
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Solution

The correct option is A 60,800
Given numbers are 65430 and 4560.
65430 lies between 65400 and 65500.
The last two digits of 65430 are 30.
If the last two digits are less than 50, then we round down the number to greatest multiple of 100 which is smaller than the given number.
30 < 50
65430 is rounded off to 65400.

4560 lies between 4500 and 4600.
The last two digits of 4560 are 60.
If the last two digits are greater than 50, then we round up the number to lowest multiple of 100 which is greater than the given number.
50 < 60
4560 is rounded off to 4600.

Difference of the numbers after rounding off
= 65400 - 4600
= 60,800

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