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July 2022 1 4 Report

Вычислите частное и проверьте ответ умножением а) 1/2 : 1/3 б) 1/2 : 1/4 в) 1/8 : 1/4 г) 1/4 : 4/5 д) 8/9 : 4/21 е) 16/25 : 24/35 ж) 52/81 : 26/27 з) 100/123 : 75/82.

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zhenyaM2002

Verified answer

А)
1/2 : 1/3 = 1/2 * 3/1 =(1*3)/(2*1) = 3/2 = 1 1/2
проверка:
1 1/2 * 1/3 = 3/2 * 1/3 = 1/2

б)
1/2 : 1/4 = 1/2 * 4/1 =(1*4)/(2*1) = 4/2 = 2
проверка:
2 * 1/4 = 2/4 = 1/2

в)
1/8 : 1/4 = 1/8 * 4/1 = 4/8 = 1/2
проверка:
1/2 * 1/4 = 1/8

г)
1/4 : 4/5 = 1/4 * 5/4 = 5/16
проверка:
5/16 * 4/5 = 4/16 = 1/4

д)
8/9 : 4/21 = 8/9 * 21/4 =(8*21)/(9*4)=(2*7)/(3*1) = 14/3 = 4 2/3
проверка:
4 2/3 * 4/21 = 14/3 * 4/21 = (14*4)/(3*21)= (2 *4)/(3*3) = 8/9

е)
16/25 : 24/35 = 16/25 * 35/24 = (16*35)/(25*24)= (2*7)/(5*3) = 14/15
проверка:
14/15 * 24/35 = (14*24)/(15*35) = (2*8)/(5*5) = 16/25

ж)
52/81 : 26/27 = 52/81 * 27/26 = (52*27)/(81*26) = (2*1)/(3*1)=2/3
проверка:
2/3 * 26/27 = (2*26)/(3*27) = 52/81

з)
100/123 : 75/82 = 100/123 * 82/75 = (100*82)/(123*75)= (4*2)/(3*3)= 8/9
проверка:
8/9 * 75/82 = (8*75)/(9*82) = (4*25)/(3*41) = 100/123

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