Math

What is my learning goal?My learning goal is to know how to use a ++ or -- strategy.

What have I learned?I have learned that if you ++ or-- on both sides for example. 24-18=6.
                                                                                                                          +2 +2
                                                                                                                           26  20
What is my next step is?My next step in this strategy is to be able to -- or ++ bigger numbers like 1000+.