30-20=, 20, 10, 50, 70-30=, 40, 50, 20, 90-40=, 70, 60, 50, 60-50=, 10, 20, 30, 100-50=, 40, 50, 60, 70-20=, 60, 70, 50, 100-90=, 10, 20, 60, 80-40=, 30, 40, 50, 40-10=, 40, 30, 20, 100-100=, 10, 90, 0.

Odejmowanie dziesiątkami w zakresie 100

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