Question

tính 

D = 1 3/8 + 1/8 : ( 0,75 - 1/2 ) - 25% . 1/2

Answer 1

\(D=\frac{13}{8}+\frac{1}{8}:\left(0,75-\frac{1}{2}\right)-25\%.\frac{1}{2}\)

\(D=\frac{13}{8}+\frac{1}{8}:\left(\frac{3}{4}-\frac{1}{2}\right)-\frac{1}{4}X\frac{1}{2}\)

\(D=\frac{13}{8}+\frac{1}{8}:\frac{1}{4}-\frac{1}{4}X\frac{1}{2}\)

\(D=\frac{13}{8}+\frac{4}{8}-\frac{1}{8}\)

\(D=\frac{17}{8}-\frac{1}{8}\)

\(D=2\)

Answer 2

Dễ thế mà ko bik lm hả bạn

Answer 3

TÍNH

\(D=\frac{13}{8}+\frac{1}{8}\div\left(0,75-1,2\right)-25\%.\frac{1}{2}\)

\(D=\frac{13}{8}+\frac{1}{8}\div\frac{-9}{20}-\frac{1}{4}.\frac{1}{2}\)

\(D=\frac{13}{8}+\frac{-5}{18}-\frac{1}{8}\)

\(D=\frac{13}{8}-\frac{1}{8}+\frac{-5}{18}\)

\(D=\frac{3}{2}+\frac{-5}{18}\)

\(D=\frac{11}{9}\)

CHÚC BN HỌC TỐT !!!!!