Question

 giải hộ mik  nha , giải rõ ràng  , chi tiết cho mik ra nhá 

Bài 1 : Tính

a) \(\dfrac{7}{12}+\dfrac{3}{4}\) x \(\dfrac{2}{9}\)                                  b) \(\dfrac{8}{9}-\dfrac{4}{15}\) : \(\dfrac{2}{5}\)

Answer 1

\(a,\dfrac{7}{12}+\dfrac{3}{4}\times\dfrac{2}{9}=\dfrac{7}{12}+\dfrac{1}{6}=\dfrac{7}{12}+\dfrac{2}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)

\(b,\dfrac{8}{9}-\dfrac{4}{15}:\dfrac{2}{5}=\dfrac{8}{9}-\dfrac{4}{15}\times\dfrac{5}{2}=\dfrac{8}{9}-\dfrac{2}{3}=\dfrac{8}{9}-\dfrac{6}{9}=\dfrac{2}{9}\)

Answer 2

đùa thì kệ con mẹ mày xàm loz

Answer 3

Đáp án a là 0,75 

Đáp án b: là 0.86222222222

Answer 4

a.\(\dfrac{7}{12}+\dfrac{3}{4}\times\dfrac{2}{9}=\dfrac{7}{12}+\dfrac{1}{6}=\dfrac{7}{12}+\dfrac{2}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)

b.\(\dfrac{8}{9}-\dfrac{4}{15}:\dfrac{2}{5}=\dfrac{8}{9}-\dfrac{4}{15}\times\dfrac{5}{2}=\dfrac{8}{9}-\dfrac{2}{3}=\dfrac{8}{9}-\dfrac{6}{9}=\dfrac{2}{9}\)