Oblicz:
4/5razy2/9razy6/7razy7/8=
4/7razy1cała3/4razy3całe1/2=
1cała5/8razy3całe1/5razy2/20=
PROSZE
4/5*2/9*6/7*7/8=8/45*42/56=336/2520=84/630=14/105
4/7*7/4*7/2=7/2=3 1/2
13/8*16/5*2/20=416/800=104/200=13/25
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4/5*2/9*6/7*7/8=8/45*42/56=336/2520=84/630=14/105
4/7*7/4*7/2=7/2=3 1/2
13/8*16/5*2/20=416/800=104/200=13/25