1.Oblicz ułamki.
1 1/2 + 1/4 =
5 8/5 + 1 3/4 =
4 2/3 - 2 2/7 =
8 1/10 - 6 3/5 =
18 x 5 2/3 =
2 1/3 x 1 2/7 =
4 1/6 : 15 =
4 2/7 : 3 1/8
1/6 : 15 = 4 2/7 : 3 1/8
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a)1 1/2+1/4= 3/2+1/4=12/8+2/8=14/8= 1 6/8
b)5 8/5+1 3/4= 33/5+7/4=132/20+35/20=167/20=8 7/20
c)4 2/3- 2 2/7=14/3-16/7=98/21-48/21=50/21=2 8/21
d)8 1/10-6 3/5=81/10-33/5=405/10-33/10=372/10=37 2/10
e)18x 5 2/3=18/1x17/3=102
f)2 1/3x1 2/7=7/3x9/2=21/2=10 1/2
g) 4 1/6:15=25/6:15/10=25/6x10/15=50/18=2 14/18
h)4 2/7: 3 1/8=30/7:25/8=30/7x8/25=48/35= 1 13/35
i)1/6:15=1/6x10/15=10/90