Question

Thực hiện phép tính :

\(\left(6\dfrac{1}{5}:21,7-1,2\times5^3\right)\times1\dfrac{3}{4}-\dfrac{1}{2}\)

Giúp mik vs nha . Giúp ròi mik sẽ hậu tạ quà cảm ơn nhek .

Answer 1

(31/5:217/10-1,2*125)*7/4-1/2

=(2/7-150)*7/4-1/2

=-1048/7*7/4-1/2

=-262-1/2

=-525/2

Answer 2

\(\left(6\dfrac{1}{5}:21,7-1,2\cdot5^3\right)\cdot1\dfrac{3}{4}-\dfrac{1}{2}\)

\(=\left(\dfrac{31}{5}\cdot\dfrac{10}{217}-1,2\cdot125\right)\cdot1,75-0,5\)

\(=\left(\dfrac{62}{217}-150\right)\cdot1,75-0,5\)

\(=\dfrac{62}{217}\cdot1,75-150\cdot1,75-0,5\)

\(=0,5-262,5-0,5\)

\(=-262,5\)

Answer 3

tự tính