October 2018 2 7 Report

Ułamki zwykłe, dodawanie i odejmowanie klasa 5. pomóżcie!!!

Oblicz:

a: 2 3/7 + 4 3/9 - 1 12/14 =

b: 6 2/5 - 4 1/3 - 2 7/30 =


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