55 x \(\dfrac{1}{20}\) x 22 x 33 :125
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11x11=121
22x22=484
33x33=1089
44x44=1936
55x55=3025
66x66=4356
k mk nhé,1000000% đúng
a. 11 x11= 121 ; 22 x 22=484 , b.44 x 44 = 1936 ; 55 x 55 = 3025
\(\left(x+\dfrac{2}{3}\right)+\dfrac{1}{11}=\left(\dfrac{10}{-33}.\dfrac{11}{8}\right).\dfrac{24}{-55}\)
\(\Rightarrow\left(x+\dfrac{2}{3}\right)+\dfrac{1}{11}=\dfrac{-5}{12}.\dfrac{24}{-55}\)
\(\Rightarrow\left(x+\dfrac{2}{3}\right)+\dfrac{1}{11}=\dfrac{2}{11}\)
\(\Rightarrow x+\dfrac{2}{3}=\dfrac{2}{11}-\dfrac{1}{11}\)
\(\Rightarrow x+\dfrac{2}{3}=\dfrac{1}{11}\)
\(\Rightarrow x=\dfrac{1}{11}-\dfrac{2}{3}\)
\(\Rightarrow x=-\dfrac{19}{33}\)
33x55x(22x3-66)
=33x55x(66-66)
=55x55x0
=0
thấy đúng thì tích nha
= 2/5 + 1/5 + 1/5
= 4/5
b. = 2/7 + 4/7 + 5/21
= 6/21 + 12/21 + 5/21
= 23/21
HT
0,44 x (\(x+x\times\) 5 - \(\dfrac{23}{55}\)) + \(\dfrac{3}{14}\) x 2,24 = 1
0,44 x (\(x+x\times\)5 - \(\dfrac{23}{55}\)) + 0,48 = 1
0,44 x (\(x+x\times\) 5 - \(\dfrac{23}{55}\)) = 1 - 0,48
0,44 x (\(x+x\times5\) - \(\dfrac{23}{55}\)) = 0,52
\(x+x\times5\) - \(\dfrac{23}{55}\) = 0,52 : 0,44
\(x\) x (1 + 5) -\(\dfrac{23}{55}\) = \(\dfrac{13}{11}\)
\(x\) x 6 - \(\dfrac{66}{10}\) = \(\dfrac{13}{11}\) + \(\dfrac{23}{55}\)
\(x\) x 6 = \(\dfrac{65}{55}\) + \(\dfrac{23}{55}\)
\(x\times\) 6 = \(\dfrac{8}{5}\)
\(x\) x 6 = \(\dfrac{8}{5}\) : 6
\(x\) = \(\dfrac{4}{15}\)
Vậy \(x=\dfrac{4}{15}\)
\(5^5.\dfrac{1}{20}.2^2.3^3:125\)
\(=5^5.\dfrac{1}{2^2.5}.2^2.3^3:5^3\)
\(=\dfrac{2^2.3^3.5^5}{2^2.5^4}=3^3.5=27.5=135\)
= 3125 x 1/20 x 4 x 27 : 125
= 625/4 x 4 x 27 : 125
= 625 x 27 : 125
= 16875 : 125
= 135