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# Dp

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### Dp

1. 1. Decimal places<br />
2. 2. Illustration<br />Decimal places (d.p.) refer to the digits to right of the decimal point. For example ‘23.845’ have 3 decimal places.<br />The numbers we get from a computation often contains worthless digits that must be thrown away.<br />Whenever we do this we must round our answer to the required decimal places.<br />
3. 3. Rule 1<br />If the first digit to be discarded is greater than 5, or a 5 followed by a non zero in any of the decimal placed to the right, then round up by the last digit retained.<br />
4. 4. Rule 2<br />If the first digit to be discarded is less than 5, round down by the last digit retained.<br />Write -6.0439 to 2 d.p. Here 3 is first discarded digit and 4 is the last retained digit. Since 3<5 so we round down and hence result will be -6.04.<br />
5. 5. Rule 3 (Important)<br />If the first digit to be discarded is equal to 5, always round to the nearest even number. <br />
6. 6. Do not Forget to…<br />When you were asked to write a number to for example to 3 d.p., consider the first 4 d.p. places during the computation and write the end result to 3 decimal places.<br />Got It?<br />
7. 7. For example, here is a series of addition and result is required to 2.d.p<br />
8. 8. Any<br /> ?<br />