Răspuns:
Explicație pas cu pas:
x/y = ?
a) x = 1/2 si y = 0,25
x/y = (1/2) : ( 25/100) = (1/2) × 100/25 = 100 /50 = 2
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b)
x = 1,(6) = (16-1)/9 = (15/9)⁽³ = (15:3)/(9:3) = 5/3
y = 0,1(6) = (16-1)/90 = (15/90)⁽¹⁵ =(15:15)/(90:15) = 1/6
x/y = (5/3) /(1/6) = (5/3) × 6/1 = (5×6)/3 = (30/3)⁽³= 10
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c)
x = 1,1(3) = (113-11)/90 = (102/90)⁽⁶ =(102:6)/(90:6)=17/15
y = 0,85 = (85/100)⁽⁵ =(85:5)/(100:5) = 17/20
x/y = (17/15) /(17/20 ) = (17/15) × ( 20/17) = (17/17) ×(20/15)⁽⁵ = 4/3