Question

tính nhanh:

\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)\)

Answer 1

\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)=\frac{37}{45}-\frac{7}{45}+\frac{36}{108}+\frac{5}{13}.\)

                                                           \(=\left(\frac{37}{45}-\frac{7}{45}\right)+\left(\frac{36}{108}+\frac{5}{13}\right)\)

                                                            \(=\frac{2}{3}+\frac{28}{39}\)

                                                              \(=\frac{18}{13}\)

Answer 2

\((\frac{37}{45}-\frac{7}{45})+(\frac{36}{108}-\frac{5}{13})\)

=\(\frac{2}{3}+-\frac{2}{39}\)=\(\frac{8}{13}\)

Answer 3

\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)\)

\(=\frac{37}{45}-\frac{7}{45}+\frac{1}{3}+\frac{5}{13}\)

\(=\left(\frac{37}{45}-\frac{7}{45}+\frac{1}{3}\right)+\frac{5}{13}\)

\(=\left(\frac{2}{3}+\frac{1}{3}\right)+\frac{5}{13}\)

\(=1+\frac{5}{13}\)

\(=\frac{18}{13}\)

\(=\frac{8}{13}\)

Answer 4

\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)\)

= \(\frac{37}{45}-\frac{7}{45}+\frac{36}{108}+\frac{5}{13}\)

=30/45 + 1/3 + 5/13 

=2/3+ 1/3+ 5/13 

=1+ 5/13

= 18/13