Oblicz
a) 3/4 x 2/3 + 2 4/5
b) (2 1/3 - 1 3/4) : 7/8
a) 3/4 x 2/3 + 2 4/5
b) (2 1/3 - 1 3/4) : 7/8
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Odpowiedź:
3/4 * 2/3 + 2 i 4/5 = 1/2 + 2 i 4/5 = 5/10 + 2 i 8/10 = 2 i 13/10 = 3 i 3/10
(2 i 1/3 - 1 i 3/4) : 7/8 = (2 i 4/12 - 1 i 9/12) : 7/8 = (1 i 16/12 - 1 i 9/12) : 7/8 = 7/12 * 8/7 = 2/3