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) 1cała 3/4+2całe 1/5+1cała 6/10= 2całe 1/4+1cała 5/5+7/16= 1cała 4/9+2całe 5/6+1cała 7/12= z góry dziękuję :)
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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 i 3/4+2 i 1/5+1 i 6/10 = 1 i 15/20+2 i 4/20+1 i 12/20 = 4 i 31/20 = 5 i 11/20
2 i 1/4+1 i 5/5+7/16 = 2 i 4/16+2+7/16 = 4 i 11/16
1 i 4/9+2 i 5/6+1 i 7/12 = 1 i 16/36+2 i 30/36+1 i 21/36 = 4 i 67/36 =
= 5 i 31/36