a).3/5 · 2/7 = 6/35
b).4/5 · 3/8 = 3/10
c).3/4 · 8/9 = 2/3 (4 i 8 skracamy przez 4)
d).7/15 · 10/21 = 2/9 (7 i 21 skracamy przez 7 , 15 i 10 skracamy przez 5)
e).2 i 3/4 · 1/2 = 11/4 · 1/2 = 11/8 = 1 i 3/8
f).5/9 · 4 i 1/10 = 5/9 · 41/10 = 41/18 = 2 i 5/18
g).2 i 1/2 · 5 i 1/3 = 5/2 · 16/3 = 40/3 = 13 i 1/3
h).3 i 3/4 · 4 i 1/5 = 15/4 · 21/5 = 63/4 = 15 i 3/4
i).5 i 6/7 · 4 i 2/3 = 41/7 · 14/3 = 82/3 = 27 i 1/3
j).4/5 · 2/9 · 6/7 · 7/8 = 8/45 · 3/4 = 2/15
k).4/7 · 1 i 3/4 · 3 i 1/2 = 4/7 · 7/4 · 7/2 = 1 · 7/2 = 7/2 = 3 i 1/2
l).1 i 5/8 · 3 i 1/5 · 2/26 = 13/8 · 16/5 · 2/26 = 26/5 · 2/26 = 2/5
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a).3/5 · 2/7 = 6/35
b).4/5 · 3/8 = 3/10
c).3/4 · 8/9 = 2/3 (4 i 8 skracamy przez 4)
d).7/15 · 10/21 = 2/9 (7 i 21 skracamy przez 7 , 15 i 10 skracamy przez 5)
e).2 i 3/4 · 1/2 = 11/4 · 1/2 = 11/8 = 1 i 3/8
f).5/9 · 4 i 1/10 = 5/9 · 41/10 = 41/18 = 2 i 5/18
g).2 i 1/2 · 5 i 1/3 = 5/2 · 16/3 = 40/3 = 13 i 1/3
h).3 i 3/4 · 4 i 1/5 = 15/4 · 21/5 = 63/4 = 15 i 3/4
i).5 i 6/7 · 4 i 2/3 = 41/7 · 14/3 = 82/3 = 27 i 1/3
j).4/5 · 2/9 · 6/7 · 7/8 = 8/45 · 3/4 = 2/15
k).4/7 · 1 i 3/4 · 3 i 1/2 = 4/7 · 7/4 · 7/2 = 1 · 7/2 = 7/2 = 3 i 1/2
l).1 i 5/8 · 3 i 1/5 · 2/26 = 13/8 · 16/5 · 2/26 = 26/5 · 2/26 = 2/5