Question

\(\dfrac{15}{12}\)x\(\left(\dfrac{3}{24}-\dfrac{1}{12}\right)\)+\(\dfrac{15}{12}\)x\(\left(\dfrac{11}{6}-\dfrac{7}{8}\right)\)

cứu tớ với! ai cứu được tui cho 1000 sp nhé!! UY TÍN NHA!!

Answer 1

\(\dfrac{15}{12}\times\left(\dfrac{3}{24}-\dfrac{1}{12}\right)+\dfrac{15}{12}\times\left(\dfrac{11}{6}-\dfrac{7}{8}\right)\\ =\dfrac{15}{12}\times\left(\dfrac{1}{8}-\dfrac{1}{12}\right)+\dfrac{15}{12}\times\left(\dfrac{11}{6}-\dfrac{7}{8}\right)\\ =\dfrac{5}{4}\times\left(\dfrac{1}{8}-\dfrac{1}{12}\right)+\dfrac{5}{4}\times\left(\dfrac{22}{12}-\dfrac{7}{8}\right)\\ =\dfrac{5}{4}\times\left(\dfrac{1}{8}-\dfrac{1}{12}+\dfrac{22}{12}-\dfrac{7}{8}\right)\\ =\dfrac{5}{4}\times\left(\dfrac{21}{12}-\dfrac{6}{8}\right)\\ =\dfrac{5}{4}\times\left(\dfrac{7}{4}-\dfrac{3}{4}\right)\\ =\dfrac{5}{4}\times1\\ =\dfrac{5}{4}\)

Answer 2

`15/12 . (3/24 - 1/12 + 11/6 - 7/8)`

`= 15/12 . (3/24 - 2/24 + 44/24 - 21/24)`

`= 15/12 . 24/24`

`= 15/12 . 1`

`= 15/12`