wpisz brakujace liczniki i mianowniki ulamków - razy 2/3=2/5 3/7 razy _ =4/21 1 1/2 razy _ =1/2 6/7 razy _ = 2 2/7
3/5 x 2/3 = 2/5
3/4 x 4/9 = 4/21
1 1/2 x 1/3 = 1/2
6/7 x 2 2/3 = 2 2/7
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3/5 x 2/3 = 2/5
3/4 x 4/9 = 4/21
1 1/2 x 1/3 = 1/2
6/7 x 2 2/3 = 2 2/7