Question

Oblicz :
a= (-0.5) : - 2 * (-0.8)
b= [1 * (-2 + (-2.1) : (-0.7)] * (-1)

Oblicz jakim ułamkiem liczby a jest liczba b i jakim ułamkiem liczby b jest liczba a

Answer 1

a= (-0.5) :  - 2 * (-0.8) = (- 5/10) : 1/3 - 5/2 * (-8/10) = (-1/2) : 1/3 - 5/2 * (-4/5) = (-1/2) * 3/1 - 5/2 * (-5/4) = -3/2 - (-25/8)= -12/8 + 25/8 = 13/8 = 1  5/8

 

 

b= [1 * (-2 + (-2.1) : (-0.7)] * (-1) = [5/4 * (-8/3 + (-21/10)  : (-7/10)] * (-1)= [5/4* (-8/3+(-21/10{21 skróć na 3 a 10 na 1}) * (-10/7 {skróć 10 na 1 a 7 na 1}) ] *(-1) = [5/4*(-8/3 + 3/1)]*(-1) = [5/4*(-8/3+9/3)] * (-1) = [5/4 * 1/3] * (-1)= 5/12 * (-1) = -5/12

 

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