Question

tính

\(\frac{18}{15}-\frac{85}{100}+\frac{42}{10}+\frac{18}{9}\)\(-\frac{12}{16}\)

 

Answer 1

\(=\frac{29}{5}\)

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Answer 2

\(\frac{18}{15}-\frac{85}{100}+\frac{42}{10}+\frac{18}{9}-\frac{12}{16}\)

= \(\frac{7}{20}+\frac{42}{10}+\frac{18}{9}-\frac{12}{16}\)

= \(\frac{23}{20}+\frac{18}{9}-\frac{12}{16}\)

= \(\frac{63}{20}-\frac{12}{16}\)

= \(\frac{12}{5}\).

Answer 3

91/20

Answer 4

\(\frac{18}{15}-\frac{85}{100}+\frac{42}{10}+\frac{18}{9}-\frac{12}{16}\)

\(=\frac{6}{5}-\frac{17}{20}+\frac{21}{5}+2-\frac{3}{4}\)

\(=\left(\frac{6}{5}+\frac{21}{5}\right)-\left(\frac{17}{20}+\frac{3}{4}\right)+2\)

\(=\frac{27}{5}-\frac{8}{5}+2\)

\(=3+2\)

=5