To add or subtract any two decimals, arrange the digits so that the decimal points are vertically aligned, and then add or subtract the digits normally. Retain the decimal point in the same vertically aligned position in the solution.

Example;

1. 0.68 + 10.76                              b) 12.62 – 8.416

 0.68                                                    12.62

10.76                                          -        08.416

11.44                                                    21.036