29. Oblicz, pamiętając o kolejności wykonywania działań. a) (5 3/7 - 3 2/5) x 7 b) 3 4/5 + 2 5/12 x 6 c) 3 1/4 : 4 + 1 1/8 x 2
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a) (5 3/7 - 3 2/5) x 7 = (38/7 - 17/5) * 7 = (190/35 - 119/35)*7=
= 71/35 * 7 =497/35=14 1/5
b) 3 4/5 + 2 5/12 x 6 = 19/5 + 29/12 x 6=19/5+ 29/2=
= 38/10 + 145/10=183/10=18 3/10
c) 3 1/4 : 4 + 1 1/8 x 2= 13/4 * 1/4 + 9/8 * 2 = 13/16 + 18/8 =
= 13/16 + 36/16=49/16=3 1/16