October 2018 1 21 Report

oblicz dodajemy i odejmujemy ułamki o różnych mianownikach:

1 i 1/5 + 2 i 7/10=2 i 2/10+1 i 7/10=3 i 9/10=...

4/5-4/6= /30 - /30=...

2/5-1/10=4/10-1/10=3/10=...


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