Question

Bài 1 Tìm x,biết 

x.3/5=2/3

x.7/17=17/8

3/4 chia  x=-7/12

3/8 - 1/6.x=1/4

1/3+1/2 chia x=-4

Bài 2 Tính

-6/11 chia [3/5 . 4/11]

7/12 + 5/12 chia 6 -11/36

[4/5 + 1/2] chia [3/13 - 8/13]

[2/3 - 1/4 + 5/11] chia [5/12 + 1 -7/11]

                                               *Dấu . là dấu nhân nha mn*

Answer 1

Bài 1:

a: \(x=\dfrac{2}{3}:\dfrac{3}{5}=\dfrac{2}{3}\cdot\dfrac{5}{3}=\dfrac{10}{9}\)

b: \(x=\dfrac{17}{8}:\dfrac{7}{17}=\dfrac{17}{8}\cdot\dfrac{17}{7}=\dfrac{289}{56}\)

c: \(x=-\dfrac{3}{4}:\dfrac{7}{12}=\dfrac{-3}{4}\cdot\dfrac{12}{7}=\dfrac{-63}{28}=-\dfrac{9}{4}\)

d: \(\Leftrightarrow x\cdot\dfrac{1}{6}=\dfrac{3}{8}-\dfrac{1}{4}=\dfrac{1}{4}\)

hay \(x=\dfrac{1}{4}:\dfrac{1}{6}=\dfrac{3}{2}\)

e: \(\Leftrightarrow\dfrac{1}{2}:x=-4-\dfrac{1}{3}=-\dfrac{17}{3}\)

hay \(x=-\dfrac{1}{2}:\dfrac{17}{3}=\dfrac{-3}{34}\)

Answer 2

dad