Ответы на вопрос:
1) 5/6 * 9/15 - 5/12*4/15 = = (5*9) / (6*15) - (5*4)/ (12*15)= = (1*3) / (2*3) - (1*1) /(3*3)= = 1/2 - 1/9= 9/18- 2/18 = 7/18 2) 7/18*9/14 - 5/12*4/15= = (7*9)/(18*14) - (5*4) / (12*15)= = (1*1)/( 2*2) - (1*1)/ (3*3)= =1/4-1/9 = 9/36 - 4/36 = 5/36 3) 9/20*2/3 + 5/14*7/25= = (9*2)/ (20*3) + (5*7)/(14*25)= = (3*1)/ (10*1) + (1*1)/(2*5) = = 3/10 + 1/10 = 4/10= 2/5
Популярно: Математика
-
zlatoust9908.08.2021 03:53
-
Hiitsmi02.05.2021 20:43
-
Mary170829.05.2021 16:53
-
Alia17810.05.2023 01:47
-
Дедад28.02.2023 11:06
-
wenefep0712625.12.2022 06:06
-
lizonkagrbnw31.10.2021 22:52
-
Aleksandra232032306.10.2022 08:51
-
GETRRRR10.04.2023 16:31
-
SlonoMen14.06.2023 06:24