What I have learnt this Week

Learn To Solve Addition, Division, and Subtraction problems using Reversibility.

Example: 78 - 45

add 5 to 45 to make 50.

50 + 20 = 70 

70 + 8 =78 

20 + 5 + 8 =33

Thats how you solve mathmatical problems using Reversibility.