Опубликовано 08.06.2017 по предмету Математика от Гость >> <<

сократите дробь

помогите пожалуйста

7*3/3*14

10*9/30*9

10*11*9/12*10*11

12*14*16/14*16*18

4*12/5*9

14*15/21*20

5*9/6*7*30

3*4*25/24*15

Ответ оставил Гость

7*3          7          1------- = ------- = -----    <-  дроби сократились
3*14       14         2 сперва 3 на 3, затем 7 на 7 и 14 на 7=========================================================== 10*9          10          1-------- = ------- = -------     <-  дроби сократились30*9          30         3 сперва 9 на 9, затем 10 на 10 и 30 на 10============================================================ 10*11*9                                                                         9                                                       3-----------  = сокращаем 10 на 10 и 11 на 11 = ----------  сократим еще на 3   = ----------12*10*11                                                                      12                                                    4 =======================================================================  12*14*16                                                     12
------------- = сокращаем 14 и 14, а также 16 и 16 = -------------- делим( или сокращаем) на 6
14*16*18                                                                   18
       2
= ---------
       3
 ================================================================ 4*12                                                                                              4*4------- = сокращаем: 12 делим на 3 и 9 делим на 3 = ------------- перемножаем5*9                                                                                                 5*3 16             1----- = 1 ------15            15  ====================================================================== 14*15                                                                                                 14*3---------- = сокращаем: 15 делим на 5 и 20 делим на 5 = ----------- =
21*20                                                                                                 21*4                                                                                            14*1=сокращаем: 3 делим на 3 и 21 делим на 3 = -------------- =                                                                                             7*4                                                                                             2               1= сокращаем: 14 делим на 7 и 7 делим на 7 = ---------- = ---------
                                                                                             4               2====================================================================      5*9------------ = сокращаем: 5 делим на 5 и 30 делим на 5 а также 6 на 3 и 9 на 36*7*30           1*3                                                                                                 1*1=--------------- = сокращаем: 3 делим на 3 и 6 делим на 3 = -------------  перемножаем       2*7*6                                                                                               2*7*2         1=-----------        28  ======================================================================  3*4*25                                                                                                4*25-----------  = сокращаем: 3 делим на 3 и 15 делим на 3 = ----------------- = 24*15                                                                                                 24*5                                                                                              4*5=сокращаем: 25 делим на 5 и 5 делим на 5 = --------------- =                                                                                               24                                                                                           5=сокращаем: 4 делим на 4 и 24 делим на 4 = --------                                                                                           6================================================================ помогла?
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