Предмет: Алгебра, автор: Mary230999

7 класс. Помогите напишите на бумажке ПОДРОБНОЕ РЕШЕНИЕ 
(многоточия- бесконечная  десятичная дробь) 

Приложения:

Ответы

Автор ответа: Artem112
0

x=0.(6)

10x=6.(6)

9x=6.(6)-0.(6)=6

x=6/9

 

x=0.12(3)

100x=12.(3)

1000x=123.(3)

900x=123.(3)-12.(3)=111

x=111/900

 

frac{0.(6)+frac{1}{3}}{0.12(3):0.0925}+12.5cdot0.64=frac{frac{2}{3}+frac{1}{3}}{frac{111}{900}:frac{925}{10000}}+8= \ =frac{1}{frac{37}{300}cdotfrac{400}{37}}+8=frac{1}{frac{400}{300}}+8=frac{3}{4}+8=0.75+8=8.75

Ответ: 8,75

 

 

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