Question

Thực hiện phép tính (Hợp lí nếu có thể):

a) \(\dfrac{1}{4}.\left(-24,88\right)-0,25.45,12-70.0,75\)

b)\(1,375-\left(\dfrac{11}{3}+1,375\right)+\left(-3\right)^2.\dfrac{1}{9}\)

Answer 1

a: \(\dfrac{1}{4}\cdot\left(-24,88\right)-0,25\cdot45,12-70\cdot0,75\)

\(=-6,22-11,28-52,5\)

=-17,5-52,5

=-70

b: \(1,375-\left(\dfrac{11}{3}+1,375\right)+\left(-3\right)^2\cdot\dfrac{1}{9}\)

\(=1,375-\dfrac{11}{3}-1,375+9\cdot\dfrac{1}{9}\)

\(=-\dfrac{11}{3}+1=-\dfrac{8}{3}\)