Предмет: Математика, автор: shekeraliza

Помогите пожалуйста разобраться.​

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Ответы

Автор ответа: Аноним
2

10\frac{5}{8}-x=7\frac{3}{5}\\\\ \frac{85}{8}-x=\frac{38}{5}\\\\ -x=\frac{38}{5}-\frac{85}{8}\\\\ -x=-\frac{121}{40}\\\\ x=  \frac{121}{40}=3\frac{1}{40}=3,025

Автор ответа: polinaryapolovayes
0

Ответ: 3 1/40

Пошаговое объяснение:

(если что, во всем моем объяснении "/" будет означать дробную черту

Ну смотри, для того что-бы найти x вычетаемого, нужно из уменьшаймого вычесть разность.

Итак, вычитаем:

Преобразуем смешанные числа в неправильные дроби:

Преобразуем первое смешанное число в неправильную дробь:

10 5/8 = 5 + 10·8/8 = 85/8

Преобразуем второе смешанное число в неправильную дробь:

7 3/5 = 3 + 7·5/5 = 38/5

Приведем дроби к наименьшему общему знаменателю:

Найдем наименьшее общее кратное знаменателей дробей 85/8 и 38/5

НОК(8,5) = 40

40/8 = 5 — дополнительный множитель первой дроби

40/5 = 8 — дополнительный множитель второй дроби

85/8 = 85·5/8·5 = 425/40

38/5 = 38·8/5·8 = 304/40

Найдем разность дробей с равными знаменателями:

425/40 - 304/40 = 425 - 304/40 = 121/40

Так как числитель больше знаменателя, то преобразуем неправильную дробь в смешанное число:

121/40 = 3·40 + 1/40 = 3·40/40 + 1/40 = 3 + 1/40

Надеюсь помогла, удачи в изучении дробей, у вас все получится ^^

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