Question

12 : 4/9 - ₈ 8/15  : 4/9   ( ₈ 8/15 là tám tám phần mười lăm )

Giúp mik nhé =))

Answer 1

\(12:\frac{4}{9}-8\frac{8}{15}:\frac{4}{9}=12.\frac{9}{4}-\frac{128}{15}.\frac{9}{4}=\frac{9}{4}\left(12-\frac{128}{15}\right)\)

\(=\frac{9}{4}.\frac{52}{15}=\frac{39}{5}\)

Answer 2

=(12- 88/15 ): 4/9 

=(180/15 - 88/15 ): 4/9

=92/15 *9/4

= 39/5

Answer 3

\(12:\frac{4}{9}-8\frac{8}{15}:\frac{4}{9}=\left[12-8\frac{8}{15}\right]:\frac{4}{9}=\left[12-\left(8+\frac{8}{15}\right)\right].\frac{9}{4}\)

\(=\left[12-8-\frac{8}{15}\right].\frac{9}{4}=\left[4-\frac{8}{15}\right].\frac{9}{4}=\frac{52}{15}.\frac{9}{4}=\frac{39}{5}=7\frac{4}{5}\)