Question

Giúp mình trả lời bài này với nhé!

Tính bằng cách hợp lí

\(\frac{3}{4}:\frac{22}{9}-\left|-3x+\frac{8}{3}\right|=\frac{3}{4}\)

\(\frac{2\cdot6^9-2^5\cdot18^4}{2^2\cdot6^8}\)

\(139\frac{5}{7}:\frac{2}{3}-138\frac{2}{7}:\sqrt{\frac{4}{9}}\)

\(\left(-\frac{5}{11}:\frac{13}{8}-\frac{5}{11}:\frac{13}{5}\right)+-\frac{1}{33}\)

Answer 1

139\(\frac{5}{7}:\frac{2}{3}\)-\(138\frac{2}{7}:\sqrt{\frac{4}{9}}\)

=139\(\frac{5}{7}:\frac{2}{3}\)-\(138\frac{2}{7}:\frac{2}{3}\)

=(139\(\frac{5}{7}\)-\(138\frac{2}{7}\)):\(\frac{2}{3}\) =\(1\frac{3}{7}\):\(\frac{2}{3}\) =\(\frac{9}{7}.\frac{3}{2}\) =\(\frac{27}{14}\)

Answer 2

=\(\frac{2.2^9.3^9-2^5.2^4.3^8}{2.2^8.3^8}\)

=\(\frac{2^{10}.3^9-2^9.3^8}{2^9.3^8}\)

=\(\frac{2^9.3^8.\left(2.3-1\right)}{2^9.3^8}\)

=\(6-1\)

=5