LEARN MATH STEP BY STEP THROUGH VERY EASY PROCESS

ROUNDING OFF DECIMAL NUMBER

__Rounding Off Decimals -__

**1) Rounding Off To The Nearest Ones -**

**For rounding
off the decimal fraction to the nearest ones, we see the digit in the tenths place. If it is less than 5 (i.e. 1, 2, 3, 4), the digit in the ones
place remains the same, and the digit
in the tenths place is replaced by 0. If the digit in the tenths place is 5 or more than 5 (i.e. 5, 6, 7, 8, 9), we add 1 to the
digit in the ones place and replace the digit in the tenths place by zero.**

**Round off each of the following to the nearest ones:**

**a) 38.7**

**38.7 has 7 in the tenths place and
7 > 5, so in the answer 8 in
the ones place becomes 8 + 1 = 9 and 7 in the tenths place is replaced
by 0.**

**.: Answer is 39.0 = 39 (Ans.)**

**b) 642.3**

**642.3 has 3 in the tenths place and 3 < 5, so in the answer 2 in the ones place remains
the same and 3 in
the tenths place is replaced by 0.**

**.: Answer is 642.0 = 642 (Ans.)**