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b) 5 2/9 - 8/15=5 10/45-24/45=4 55/45-24/45=4 31/45
c) 7/12 + 3 3/4=7/12+3 9/12=3 16/12=4 4/12=4 1/3
d) 23 2/7 - 12 9/14=23 4/14-12 9/14=22 18/14-12 9/14=10 9/14
2 . Oblicz .
a) 5/6 + 3/5=25/30+18/30=43/30=1 13/30
b) 23 2/3 + 5 7/9=23 6/9+5 7/9=28 13/9=29 4/9
c) 2 5/12 + 3/8=2 10/24+9/24=2 19/24
d) 5 7/18 + 2 5/6=5 7/18+2 15/18=7 22/18=8 4/18=8 2/9
e) 4/7 - 1/3=12/21-7/21=5/21
f) 6 5/12 - 4 5/6=6 5/12-4 10/12=5 17/12-4 10/12=1 7/12
g) 4 2/7 - 2=30/7-2=16/7=2 2/7
h) 3 1/3 - 2/5 =3 5/15-6/15=2 20/15-6/15=2 14/15