Why is 25 rounded to 20 or 30?

Answer 1

25 is rounded to 30.

The next digit at the right of 2 is 5 so add one to 5.

If the next digit at the right of 5 is more than 5, add one also.

If the next digit at the right of 5 is less than 5, retain 5.

Answer 2

When rounding a number to the nearest ten, we look at the digit in the ones place. In this case, the ones digit in 25 is 5. Since 5 is greater than or equal to 5, we round up to the nearest ten, which is 30. Rounding to 20 would be incorrect in this case because 5 is closer to 30 than it is to 20.