Odpowiedź:
a)3/7-1/14=6/14-1/14=5/14
b)3/20+1/5=3/20+4/20=7/20
c)2/3+1/5=10/15+3/15=13/15
d)3/4-1/3=9/12-4/12=5/12
e)4/5+4/7=28/35+20/35=48/35=1 8/35
f)4/8-1/3=12/24-8/24=3/24
g)5/6+1/9=15/18+2/18=17/18
h)3/9-4/12=12/36-12/36=0
j)10 6/11-3 4/22=116/11-70/22=232/22-70/22=162/22=7 8/22
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Odpowiedź:
a)3/7-1/14=6/14-1/14=5/14
b)3/20+1/5=3/20+4/20=7/20
c)2/3+1/5=10/15+3/15=13/15
d)3/4-1/3=9/12-4/12=5/12
e)4/5+4/7=28/35+20/35=48/35=1 8/35
f)4/8-1/3=12/24-8/24=3/24
g)5/6+1/9=15/18+2/18=17/18
h)3/9-4/12=12/36-12/36=0
j)10 6/11-3 4/22=116/11-70/22=232/22-70/22=162/22=7 8/22