Question

7/25+(-18)/25+4/23+5/7+19/23

Tính hợp lí.🤔🤔

Answer 1

\(\frac{7}{25}+\frac{-18}{25}+\frac{4}{23}+\frac{5}{7}+\frac{19}{23}\)

\(=\left(\frac{7}{25}-\frac{11}{25}\right)+\left(\frac{4}{23}+\frac{19}{23}\right)+\frac{5}{7}\)

\(=\frac{-4}{25}+1+\frac{5}{7}\)

\(=\frac{-28}{175}+\frac{175}{175}+\frac{125}{175}\)

\(=\frac{272}{175}\)

Answer 2

\(\frac{7}{25}+\left(\frac{-18}{25}\right)+\frac{4}{23}+\frac{5}{7}+\frac{19}{23}\)

\(=\left(\frac{7-18}{25}\right)+\left(\frac{4+19}{23}\right)+\frac{5}{7}\)

\(=\frac{-11}{25}+1+\frac{5}{7}\)

\(=\frac{223}{175}\)

Answer 3

\(\frac{7}{25}\)\(+\)\(\frac{-18}{25}\)\(+\) \(\frac{4}{23}\)\(+\)\(\frac{5}{7}\)\(+\)\(\frac{19}{23}\)

\(=\)\(\left(\frac{7}{25}-\frac{18}{25}\right)\)\(+\)\(\left(\frac{4}{23}+\frac{19}{23}\right)\)\(+\)\(\frac{5}{7}\)

\(=\)\(\frac{-11}{25}\)\(+\)\(\frac{23}{23}\)\(+\)\(\frac{5}{7}\)

\(=\)\(\frac{-11}{25}\)\(+\)\(1\)\(+\)\(\frac{5}{7}\)

\(=\)\(\frac{14}{25}\)\(+\)\(\frac{5}{7}\)

\(=\)\(\frac{5}{2}\)

Hok tốt

Answer 4

Giải :

\(\frac{7}{25}+\left(\frac{-18}{25}\right)+\frac{4}{23}+\frac{5}{7}+\frac{19}{23}\)

\(=\left(\frac{7-18}{25}\right)+\left(\frac{4+19}{23}\right)+\frac{5}{7}\)

\(=\frac{-11}{25}+1+\frac{5}{7}\)

\(=\frac{223}{175}\)

Answer 5

\(\text{Giải :}\)

\(\frac{17}{6}+\frac{40}{12}=\frac{17}{6}+\frac{10}{3}=\frac{37}{6}\)

\(\frac{17}{6}+\frac{40}{12}=\frac{34}{12}+\frac{40}{12}=\frac{74}{12}=\frac{37}{6}\)

\(\left(\frac{23}{5}+\frac{6}{3}\right)x\frac{4}{7}=\left(\frac{69}{15}+\frac{30}{15}\right)x\frac{4}{7}=\frac{99}{15}x\frac{4}{7}=\frac{132}{35}\)

\(9-\frac{7}{2}:\frac{5}{3}=\frac{18}{2}-\frac{7}{2}x\frac{3}{5}=\frac{18}{2}-\frac{21}{10}=\frac{69}{10}\)

\(\text{~~Học tốt~~}\)