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Oblicz. 17\25+6\25=
38\70+21\70=. 21\50+19\50+8\50=
3\8+1\8=. 7\30+8\30+3\30=
9\20+8\20=


Odpowiedź :

Odpowiedź:

17/25 + 6/25 = 23/25

38/70 + 21/70 = 59/70

21/50 + 19/50 + 8/50 = 48/50 = 24/25

3/8 + 1/8 = 4/8 = 1/4

7/30 + 8/30 + 3/30 = 18/30 = 3/5

9/20 + 8/20 = 17/20