Addition and subtraction of decimals

Ex: evaluate a)78.105 + 0.042 + 6.432 + 0.7, b)5.89 – 2.7837

Solution: a)78.1050                               b)     5.8900

                       00.0421                                    2.7837      

                       06.4320                                    3.1063

                       00.7000

                       85.2791

Types of decimals

1. Terminating decimals

These are decimals with a definite number of decimal place, ex: 0.75, 0.004, 0.605, etc…

2. Non terminating decimals

These are decimals without a definite number of decimal place, ex: 0.333⁺, 0.45666⁺, etc…