Dodaj ułamki doprowadzając do wspólnego mianownika : a) 2/3 + 5/6 = b) 1/3 + 2/5 c) 5/6 + 3/8 = d) 7/12 + 1/9 = e) 7/10 + 4/5 = f) 3 cała 2/5 + 3/4 = g) 1 cała 1/4 + 3/8 = h) 2 cała 14/21 + 1/2 = i) 6 cała 12/20 + 2 12/15 =
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a) 2/3 + 5/6 = 4/6 + 5/6 = 9/6 = 1 3/6 = 1 1/2
b) 1/3 + 2/5 = 5/15 + 6/15 = 11/15
c) 5/6 + 3/8 = 20/24 + 9/24 = 29/24 = 1 5/24
d) 7/12 + 1/9 = 21/36 + 4/36 = 25/36
e) 7/10 + 4/5 = 7/10 + 8/10 = 15/10 = 1 5/10 = 1 1/2
f) 3 cała 2/5 + 3/4 = 17/5 + 3/4 = 68/20 + 15/20 = 83/20 = 4 3/20
g) 1 cała 1/4 + 3/8 = 5/4 + 3/8 = 10/8 + 3/8 = 13/8 = 1 5/8
h) 2 cała 14/21 + 1/2 = 56/21 + 1/2 = 112/42 + 21/42 = 133/42 = 3 7/42 = 3 1/6
i) 6 cała 12/20 + 2 12/15 = 132/20 + 42/15 = 33/5 + 14/5 = 47/5 = 9 2/5
Liczę na naj :)