Question

1, Thuc hiện phép tính.

a, 1/9* 2.145-13/3 * 1/145+ 2/145

Answer 1

xin lỗi nha

\(=\frac{2}{145}\left(\frac{1}{9}+1\right)-\frac{13}{3}.\frac{1}{145}\)

\(=\frac{2}{145}.\frac{10}{9}-\frac{13}{3}.\frac{1}{145}\)

\(=\frac{1}{145}+\frac{1}{145}.\frac{10}{9}-\frac{13}{3}.\frac{1}{145}\)

\(=\frac{1}{145}\left(\frac{10}{9}-\frac{13}{3}+1\right)\)

\(=\frac{1}{145}.-\frac{20}{9}\)

\(=-\frac{4}{261}\)

Answer 2

Mk bị nhầm chỗ 2. 145 thành 2/145 nhé. thank kiuf.

Answer 3

\(\frac{1}{9}.\frac{2}{145}-\frac{13}{3}.\frac{2}{245}+\frac{2}{145}\)

\(=\frac{2}{145}\left(\frac{1}{9}-\frac{13}{3}+1\right)\)

\(=\frac{2}{145}.\left(-\frac{29}{9}\right)\)

\(=-\frac{2}{45}\)