: Tính nhanh
36/11 x 22/17 x 52/72
Tính nhanh
36/11 x 22/17 x 52/72
MN GIÚP MÌNH NHA!
93/17: x+ [-4/17]: x+ 22/7: 52/3 = 4/11
\(\dfrac{93}{17}:x+\left[\dfrac{-4}{17}\right]:x+\dfrac{22}{7}:\dfrac{52}{3}=\dfrac{4}{11}\)
\(=>\left(\dfrac{93}{17}+\dfrac{-4}{17}\right):x+\dfrac{11}{26}=\dfrac{4}{11}\)
\(=>\dfrac{89}{17}:x+\dfrac{11}{26}=\dfrac{4}{11}\)
\(=>\dfrac{89}{17}:x=\dfrac{4}{11}-\dfrac{11}{26}\)
\(=>\dfrac{89}{17}:x=\dfrac{-17}{286}\)
\(=>x=\dfrac{89}{17}:\dfrac{-17}{286}\)
\(=>x=\dfrac{-25454}{289}=-88\dfrac{22}{289}\)
\(\dfrac{93}{17}:x-\dfrac{4}{17}:x+\dfrac{22}{7}:\dfrac{52}{3}=\dfrac{4}{11}\)
\(\Rightarrow\left(\dfrac{93}{17}-\dfrac{4}{17}\right):x+\dfrac{33}{182}=\dfrac{4}{11}\)
\(\Rightarrow\dfrac{89}{17}:x=\dfrac{365}{2002}\)
\(\Rightarrow x=\dfrac{178178}{6205}\)
Ta có: \(\dfrac{93}{17}:x+\dfrac{-4}{17}:x+\dfrac{22}{7}:\dfrac{52}{3}=\dfrac{4}{11}\)
\(\Leftrightarrow\dfrac{89}{17}:x=\dfrac{365}{2002}\)
hay \(x=\dfrac{178178}{6205}\)
tính bằng cách thuận tiện
36 x 22 x 51
--------------------
11 x 17 x 72
\(\frac{36x22x51}{11x17x72}\)=\(\frac{2x3}{2}\)=3
giảm ước 36 và 72, 22 và 11, 51 và 17
36 x 22 x 51/11 x 17 x 72 = ?
\(=\dfrac{36\cdot22\cdot51}{11\cdot17\cdot72}=\dfrac{1}{2}\cdot3\cdot2=3\)
93/17:x+(-4/17):x+22/7:52/3=4/11
(93/17+-4/17) : x + 33/182=4/11
89/17 : x = 4/11 + 33/182
89/17 : x = Sia đề
a x e x
b x f x
c x x
2
3
2 1 1 1 17 26
3 2 10 5 25 25
4 2 5 7 24
2 50 51 1 3
5 3 27 9 27
1 2
2 0
2 3 ) :
) ) ,
g x
d x h x x
3 1
1 4
7 28
17 3 7 2 7
2 0 5
2 4 4 3 12
Tìm x, biết
93/17 : x + -4/17 : x + 22/7 : 52/3 = 4/11
\(\frac{93}{17}:x+\left(\frac{-4}{17}\right):x+\frac{22}{7}:\frac{52}{3}=\frac{4}{11}\)