Предмет: Математика, автор: ilkuznetsov

найдите среднее арифметическое чисел: 1) 4,2 и 2,1 2) 3,9: 6: 9.18: и 15,8

Ответы

Автор ответа: evvoronina1

Чтобы найти среднее арифметическое нескольких чисел, нужно найти сумму этих нескольких чисел, а затем сумму разделить на количества этих чисел:
1) (4,2+2,1):2= 6,3:2=3,15
2) (3,9+6+9,18+15,8):4=34,88:4=8,72

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