Предмет: Математика, автор: innusyalop

хелп пж дроби
6 1/9- 1 2/15

Ответы

Автор ответа: Аноним
0

1   Преобразуем смешанные числа в неправильные дроби:

Преобразуем первое смешанное число в неправильную дробь:

6  1

9

 =   1 + 6·9

9

 =   55

9

Преобразуем второе смешанное число в неправильную дробь:

1  2

15

 =   2 + 1·15

15

 =   17

15

2   Приведем дроби к наименьшему общему знаменателю:

Найдем наименьшее общее кратное знаменателей дробей   55

9

 и   17

15

НОК(9,15) = 45

45/9 = 5 — дополнительный множитель первой дроби

45/15 = 3 — дополнительный множитель второй дроби

55

9

 =   55·5

9·5

 =   275

45

17

15

 =   17·3

15·3

 =   51

45

3   Найдем разность дробей с равными знаменателями:

275

45

 -   51

45

 =   275 - 51

45

 =   224

45

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

224

45

 =   4·45 + 44

45

 =   4·45

45

 +   44

45

 = 4 +   44

45

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