Question

Urgent va rog!!!!!!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

a/b = 1,25 = 125/100 = 5/4

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a)

a/b : 7/8 = 5/4 : 7/8 = 5/4*8/7 = 10/7

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b)

a/b : (-5) = 5/4 : (-5) = 5/4*(-1/5) = -1/4

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c)

(-5*a) : b/2 = -5*a*2/b = -10*a/b = -10*5/4 = -50/4 = -25/2 = -12,5

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d)

a/5 : (-b/4) = a/5*(-4/b) = -4/5*a/b = -4/5*5/4 = -1