Question

Tính hợp lý:

(75%+1/2): |- \(1\frac{1}{2}\)| - \(\frac{5}{27}\).1,8 . 2012⁰

Answer 1

               \(\left(75\%+\frac{1}{2}\right)\text{ : }\left|-1\frac{1}{2}\right|-\frac{5}{27}\cdot1,8\cdot2012^0\)

\(=\left(\frac{3}{4}+\frac{1}{2}\right):\left|-\frac{3}{2}\right|-\frac{5}{27}\cdot\frac{9}{5}\)

\(=\frac{5}{4}\text{ : }\frac{3}{2}-\frac{1}{3}\)

\(=\frac{5}{6}-\frac{1}{3}\)

\(=\frac{1}{2}\)

Answer 2

\(\left(75\%+\frac{1}{2}\right)-\left|-1\frac{1}{2}\right|-\frac{5}{27}\cdot1,8\cdot2012^0\)

\(=\left(\frac{75}{100}+\frac{1}{2}\right)-\left|-\frac{3}{2}\right|-\frac{5}{27}\cdot\frac{9}{5}\cdot1\)

\(=\left(\frac{3}{4}+\frac{1}{2}\right)-\frac{3}{2}-\frac{5}{27}\cdot\frac{9}{5}\)

\(=\left(\frac{3}{4}+\frac{2}{4}\right)-\frac{3}{2}\cdot\frac{1}{3}\)

\(=\frac{5}{4}-\frac{1}{2}=\frac{5}{4}-\frac{2}{4}=\frac{3}{4}\)

Ez mà :)))

Answer 3

Nhầm :(

\(\left(75\%+\frac{1}{2}\right):\left|-1\frac{1}{2}\right|-\frac{5}{27}\cdot1,8\cdot2012^0\)

\(=\left(\frac{75}{100}+\frac{1}{2}\right):\left|-\frac{3}{2}\right|-\frac{5}{27}\cdot\frac{9}{5}\)

\(=\left(\frac{3}{4}+\frac{1}{2}\right):\frac{3}{2}-\frac{5}{27}\cdot\frac{9}{5}\)

\(=\left(\frac{3}{4}+\frac{2}{4}\right):\frac{3}{2}-\frac{1}{3}\)

\(=\frac{5}{4}:\frac{3}{2}-\frac{1}{3}=\frac{5}{4}\cdot\frac{2}{3}-\frac{1}{3}=\frac{5}{2}\cdot\frac{1}{3}-\frac{1}{3}=\frac{5}{6}-\frac{1}{3}=\frac{5}{6}-\frac{2}{6}=\frac{1}{2}\)