Sprowadź ułamki do wspólnego mianownika i oblicz
a)1/2 + 1/3
1/3 + 1/4
1/4 + 1/5
b)1/5 + 2/3
1/6 + 3/4
3/7 + 2/5
c)1 3/4 + 2 1/5 + 1 6/10
2 1/4 + 1 5/8 + 7/16
1 4/9 + 2 5/6 + 1 7/12
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a) 1/2+1/3= 3/6+2/6=5/6
1/3+1/4=4/12+3/12=7/12
1/4+1/5=5/20+4/20=9/20
b) 1/5+2/3=3/15+10/15=13/15
1/6+3/4=2/12+9/12=11/12
3/7+2/5=15/35+14/35=29/35
c) 1 3/4 + 2 1/5 + 1 6/10=7/4+11/5+16/10=35/20+44/20+32/20=111/20=5 11/20
2 1/4+ 1 5/8+7/16=9/4+13/8+7/16=36/16+26/16+7/16=69/16=4 5/16
1 4/9+ 2 5/6 + 1 7/12=13/9+17/6+19/12=52/36+102/36+57/36=211/36= 5 31/36