Question

Thực hiện phép tính & tính hợp lí

\(\frac{6}{25}-\frac{81}{25}+\text{|-4|.}\frac{2}{7}-\left(-2\right)^3\)

Answer 1

\(\frac{6}{25}-\frac{81}{25}+\left|-4\right|\cdot\frac{2}{7}-(-2)^3\)

\(\Rightarrow\frac{6-81}{25}+4\cdot\frac{2}{7}-(-2)^3\)

\(=\frac{-75}{25}+\frac{8}{7}+8\)

\(=3+\frac{8}{7}+8=3+8+\frac{8}{7}=11+\frac{8}{7}=\frac{77+8}{7}=\frac{85}{7}\)

Answer 2

\(\frac{6}{25}-\frac{81}{25}+|-4|.\frac{2}{7}-\left(-2\right)^3\)

\(=\frac{6-81}{25}+4.\frac{2}{7}-\left(-8\right)\)

\(=\frac{-75}{25}+\frac{8}{7}+8\)

\(=-3+\frac{8}{7}+8\)

\(=5+\frac{8}{7}=\frac{35}{7}+\frac{8}{7}=\frac{35+8}{7}=\frac{43}{7}\)

Answer 3

Nhầm phần cuối :D ^.^

= \(-3+\frac{8}{7}+8=-3+8+\frac{8}{7}=5+\frac{8}{7}=\frac{43}{7}\)

Answer 4

hay nhỉ???