Abacus/Manual/Quick use/Subtraction

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Subtraction, as you may already know, is the opposite of addition. Simply just take away the numbers that you have put on from your original number. Heres an example:

  • 5-2=3
111110 101-
111011 110=
110111 110

Practice these till you can figure it out. It may not be as speedy to make out but over time im sure you will have a good course in it.