Câu hỏi của Nguyễn Thu Hà

Question

$\dfrac{-2}{9}+\dfrac{8}{15}+1\dfrac{2}{3}-\dfrac{7}{9}+\dfrac{-7}{15}$

Võ Ngọc Phương · Accepted Answer

$\dfrac{-2}{9}+\dfrac{8}{15}+1\dfrac{2}{3}-\dfrac{7}{9}+\dfrac{-7}{15}$

$=\dfrac{-2}{9}+\dfrac{8}{15}+\dfrac{5}{3}-\dfrac{7}{9}+\dfrac{-7}{15}$

$=\left(\dfrac{-2}{9}+\dfrac{-7}{9}\right)+\left(\dfrac{8}{15}+\dfrac{-7}{15}\right)+\dfrac{5}{3}$

$=-1+\dfrac{1}{15}+\dfrac{5}{3}$

$=\dfrac{-14}{15}+\dfrac{5}{3}$

$=\dfrac{11}{15}$

Chúc bạn học tốtCâu trả lời: $\dfrac{-2}{9}+\dfrac{8}{15}+1\dfrac{2}{3}-\dfrac{7}{9}+\dfrac{-7}{15}$

$=\dfrac{-2}{9}+\dfrac{8}{15}+\dfrac{5}{3}-\dfrac{7}{9}+\dfrac{-7}{15}$

$=\left(\dfrac{-2}{9}+\dfrac{-7}{9}\right)+\left(\dfrac{8}{15}+\dfrac{-7}{15}\right)+\dfrac{5}{3}$

$=-1+\dfrac{1}{15}+\dfrac{5}{3}$

$=\dfrac{-14}{15}+\dfrac{5}{3}$

$=\dfrac{11}{15}$

Chúc bạn học tốt

Quách Thu Thảo · Answer

= (-2/9-7/9)+(8/15-7/15)+5/3

= -1 + 1/15 + 5/3

= 11/15Câu trả lời: = (-2/9-7/9)+(8/15-7/15)+5/3

= -1 + 1/15 + 5/3

= 11/15