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evaatavina
@evaatavina
July 2022
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Найдите значение выражения:
А) 2/5м, если м=1/2, 2/5, 2 целых 1/2, 1 целой 7/8, 15/16.
Б) 4/9х, если х=1/4, 4/9, 4 целых 1/2
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zhenyaM2002
Verified answer
А)
, если:
m = 1/2 ⇒ 2/5 * 1/2 = (2*1) / (5*2) = 1/5
m = 2/5 ⇒ 2/5 * 2/5 = (2*2) / (5*5) = 4/25 = 0,16
m= 2 1/2 ⇒ 2/5 * 2 1/2 = 2/5 * 5/2 = 1
m= 1 7/8 ⇒ 2/5 * 1 7/8 = 2/5 * 15/8 = (2*15)/(5*8) = (1*3)/(1*4) = 3/4
m= 15/16 ⇒ 2/5 * 15/16 = (2*15) /( 5*16) = (1*3) /( 1*8) = 3/8
б)
, если :
x= 1/4 ⇒ 4/9 * 1/4 = 1/9
x= 4/9 ⇒ 4/9 * 4/9 = 16/81
x= 4 1/2 ⇒ 4/9 * 4 1/2 = 4/9 * 9/2 = 4/2 = 2
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Answers & Comments
Verified answer
А), если:
m = 1/2 ⇒ 2/5 * 1/2 = (2*1) / (5*2) = 1/5
m = 2/5 ⇒ 2/5 * 2/5 = (2*2) / (5*5) = 4/25 = 0,16
m= 2 1/2 ⇒ 2/5 * 2 1/2 = 2/5 * 5/2 = 1
m= 1 7/8 ⇒ 2/5 * 1 7/8 = 2/5 * 15/8 = (2*15)/(5*8) = (1*3)/(1*4) = 3/4
m= 15/16 ⇒ 2/5 * 15/16 = (2*15) /( 5*16) = (1*3) /( 1*8) = 3/8
б) , если :
x= 1/4 ⇒ 4/9 * 1/4 = 1/9
x= 4/9 ⇒ 4/9 * 4/9 = 16/81
x= 4 1/2 ⇒ 4/9 * 4 1/2 = 4/9 * 9/2 = 4/2 = 2