Помогите номер 93-94

Question

Помогите номер 93-94

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Answer 1

93) a)12+ 3 9/24 - 1 20/24= 12+ 81/24 - 44/24= 12+37/24=(288+37)/24=325/24=13 13/24
б) 7 16/30 + 5 21/30 - 4= 226/30+171/30-4=(397-120)/30=9 7/30
94) 41/12+22/12-2,75=63/12-2,75=21/4-2 75/100= (525-75)/100=450/100=4,5