Question

Bài 1 : Thực hiện phép tính ( tính hợp lý nếu có thể )

a ) \(\dfrac{1}{12}+\dfrac{3}{4}\)

b ) \(\dfrac{-4}{7}.1\dfrac{1}{2}\)

c )\(\dfrac{7}{9}+\left(\dfrac{2}{3}+\dfrac{-7}{9}\right)\)

d )\(\dfrac{2}{3}-\dfrac{1}{3}:\dfrac{3}{4}\)

e )\(\dfrac{-7}{25}.\dfrac{11}{13}+\dfrac{-7}{25}.\dfrac{2}{13}\)

g )\(2\dfrac{2}{5}.0,25-\left(\dfrac{11}{20}+75\%\right):\dfrac{13}{5}\)

Answer 1

a: =1/12+9/12=10/12=5/6

b: =-4/7*3/2=-12/14=-6/7

c: =7/9+2/3-7/9=2/3

d: =2/3-4/9=2/9

e: =-7/25(11/13+2/13)=-7/25