`3“(2)/(15)` `.` `(3)/(5)` `+` `3“(2)/(15)` `.` `(2)/(5)` `-` `(32)/(15)` Giúp mình nha ! 11/09/2021 Bởi Ayla `3“(2)/(15)` `.` `(3)/(5)` `+` `3“(2)/(15)` `.` `(2)/(5)` `-` `(32)/(15)` Giúp mình nha !
$3\dfrac{2}{15} . \dfrac{3}{5} + 3\dfrac{2}{15}. \dfrac{2}{5} – \dfrac{32}{15}$ $= 3\dfrac{2}{15}.(\dfrac{3}{5} + \dfrac{2}{5}) – 2\dfrac{2}{15}$ $= 3\dfrac{2}{15} . 1 – 2\dfrac{2}{15}$ $= 3\dfrac{2}{15} – 2\dfrac{2}{15}$ $= 1$ Bình luận
$3\dfrac{2}{15} . \dfrac{3}{5} + 3\dfrac{2}{15}. \dfrac{2}{5} – \dfrac{32}{15}$
$= 3\dfrac{2}{15}.(\dfrac{3}{5} + \dfrac{2}{5}) – 2\dfrac{2}{15}$
$= 3\dfrac{2}{15} . 1 – 2\dfrac{2}{15}$
$= 3\dfrac{2}{15} – 2\dfrac{2}{15}$
$= 1$
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