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аленчик19122002
@аленчик19122002
July 2022
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найдите значение выражения (7-1 5/9 : 7/24)*1 7/20
а)65/108
б)9/4
в)3/8
г)3/56
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aleksb1
Verified answer
По действиям с вашего разрешения:
Первое:
1 5/9: 7/24 = (9*1+5)/9 : 7/24 =14/9 * 24/7 = (14:7)/(9:3) * (24:3)/(7:7)=2/3*8/1=16/3= 5 1/3
Второе:
7 - 2 1/3 = 6 3/3 - 5 1/3 = 1 2/3
Третье:
1 2/3 * 1 7/20 = (3*1+2)/3 * (20*1+7)/20=5/3 * 27/20 = (5:5)/(3:3) * (27:3)/(20:5) = 1/1 * 9/4 = (1*9)/(1*4) = 9/4 = 2 1/4 = 2,25
Ответ: б) 9/4
56 votes
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Answers & Comments
Verified answer
По действиям с вашего разрешения:Первое:
1 5/9: 7/24 = (9*1+5)/9 : 7/24 =14/9 * 24/7 = (14:7)/(9:3) * (24:3)/(7:7)=2/3*8/1=16/3= 5 1/3
Второе:
7 - 2 1/3 = 6 3/3 - 5 1/3 = 1 2/3
Третье:
1 2/3 * 1 7/20 = (3*1+2)/3 * (20*1+7)/20=5/3 * 27/20 = (5:5)/(3:3) * (27:3)/(20:5) = 1/1 * 9/4 = (1*9)/(1*4) = 9/4 = 2 1/4 = 2,25
Ответ: б) 9/4