(-3,2) . \(\frac{-15}{64}\)+(0,8-2\(\frac{4}{15}\)):3\(\frac{2}{3}\)

=\(\frac{3}{4}\)+(-\(\frac{22}{15}\)):\(\frac{11}{3}\)

=\(\frac{3}{4}\)+\(\left(-\frac{22}{15}\right).\frac{3}{11}\)

=\(\frac{3}{4}\)-\(\frac{2}{5}=\frac{7}{20}\)

                    chọn đúng giúp mình nha!

sao bạn có thể viết được hỗn số và phân số?

dễ mà bạn chỉ cần bật ô trả lời chon biểu tượng giống chữ M nằm ngang nhé 

a) \(\frac{-5}{8}\cdot\left(\frac{4}{9}+\frac{-7}{12}\right)\)

\(=\frac{-5}{8}\cdot\frac{-5}{36}\)

\(=\frac{25}{288}\)

b) \(\left(-3,2\right)\cdot\frac{-15}{64}+\left(0,8-2\frac{4}{5}\right):3\frac{1}{2}\)

\(=\frac{3}{4}+\left(-2\right):\frac{7}{2}\)

\(=\frac{3}{4}+\frac{-4}{7}\)

\(=\frac{5}{28}\)

=))

\(\left(-3,2\right).\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{1}{2}=-\frac{16}{5}.-\frac{15}{64}+\left(\frac{4}{5}-\frac{34}{15}\right):\frac{7}{2}\)

\(=-\frac{3}{4}+\left(-\frac{22}{15}\right).\frac{2}{7}\)

\(=-\frac{3}{4}-\frac{44}{105}\)

\(=\frac{-315-176}{420}\)

\(=-\frac{491}{420}\)

\(\left(-3,2\right)\cdot\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{1}{2}\)

\(=\frac{3}{4}+\frac{-22}{15}:\frac{7}{2}\)

\(=\frac{3}{4}+\frac{-44}{105}\)

\(=\frac{-315}{176}\)

=))

ban vy dung

\(\left(-3,2\right).\frac{-15}{64}+\left(0,8-2\frac{4}{15}\right):3\frac{2}{3}\)

\(=\frac{3}{4}+\frac{-22}{15}:\frac{11}{3}\)

\(=\frac{3}{4}+\frac{-2}{5}=\frac{7}{20}\)

\(\frac{41}{11}\left(copy\right)\)

Chẳng biết làm 

:)

:)

41/44

41/44

\(-3,2\cdot\left(-\dfrac{15}{64}\right)+0,8-\dfrac{2}{\dfrac{4}{15}}:\dfrac{3}{\dfrac{2}{3}}\)

\(=\dfrac{3}{4}+\dfrac{4}{5}-\dfrac{15}{2}:\dfrac{9}{2}\)

\(=\dfrac{31}{20}-\dfrac{5}{3}\)

\(=-\dfrac{7}{60}\)

Đề bài như này đúng không nhỉ bạn?

\(\left(-3,2\right).\dfrac{15}{64}-\left(0,8-2\dfrac{4}{15}\right):3\dfrac{2}{3}\\ =-\dfrac{16}{5}.\dfrac{15}{64}-\left(\dfrac{4}{5}-\dfrac{34}{15}\right):\dfrac{11}{3}\\ =-\dfrac{3}{4}-\left(-\dfrac{22}{15}\right).\dfrac{3}{11}\\ =-\dfrac{3}{4}-\left(-\dfrac{2}{5}\right)=-\dfrac{3}{4}+\dfrac{2}{5}=-\dfrac{7}{20}\)