Как сделать? (5/9-1/3)-1/6 (3/4-5/12)-1/5 (17/18-5/12)-2/9 - вопрос №34287475913163451215171851229 от alex270502 07.05.2020 06:55

Question

Математика: Как сделать? (5/9-1/3)-1/6 (3/4-5/12)-1/5 (17/18-5/12)-2/9

alex270502 · Answer

1) (5/9-1/3) - 1/6 = ( 5 - 1*3 ) - 1 =   2 - 1 = 2*2 - 1*3 = 4 - 3 = 1/18
      9    6 9    6 18 18

2) (3/4 - 5/12) - 1/5 = ( 3*3 - 5 ) - 1 = ( 9 - 5 ) - 1 = 4 - 1 = 1 - 1 = 1*5 - 1*3
   12 5 12    5 12 5 3 5 12

   = 2/12 = 1/6

3) (17/18 - 5/12) - 2/9 = ( 17*2 - 5*3 ) - 2 = ( 34 - 15 ) - 2 = 19 - 2 = 19 - 2*4 =     36 9     36    9    36 9    36

   = 19 - 8   = 11/36
   36