Question

pra hoje com cálculos

Answer 1

35)....a)........( - 3/4) + ( - 1/2) : (+ 1//4)

.................= ( - 3/4) + (- 1//2 . 4/1)

.................= - 3/4 - 2/1

.................= - 3/4 - 8/4

.................= - 11/4

.................= - 2,75

b).....(- 3) . (+ 1,25) - (+ 1,2) : (- 0,6)

.......= - 3,75 - ( - 2)

.......= - 3,75 + 2

.......= - 1,75

Answer 2

A)
= (-3/4) + (-1/2) : (+1/4)
= - 3/4 - 1/2 . 4
= - 3/4 - 4/2
= - 3/4 - 2
= (- 3 - 8)/4
= - 11/4

B)
= (-3). (+1,25) - (+1,2) : (-0,6)
= - 3,75 - (1,2) : ( - 0,6)
= - 3,75 + 1,2 : 0,6
= - 3,75 + 1,2 / 0,6 . 10/10
= - 3,75 + 12/6
= - 3,75 + 2
= - 1,75