Tính nhanh:
26 x 182 + 182 x 47 + 91 x 27 x 2
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e , 12 x 35 + 35 x 182 - 35 x 94
= 35 x ( 12 + 182 - 94 )
= 35 x 100
= 3500.
n , 19 x 27 + 47 x 81 + 19 x 20
= 19 x 27 + 19 x 20 + 47 x 81
= 19 x ( 27 + 20 ) + 47 x 81
= 19 x 47 + 47 x 81
= 47 x ( 19 + 81 )
= 47 x 100
= 4700.
T I C K cho mik nha !
~ HT ~
(2+4+6+...+2020) x (182 x 234 -91 x 468)
= (2+4+6+...+2020) x (91x2x234 -91 x 234x2)
= (2+4+6+...+2020) x 0
=0
12 x 85 + 35 x 182 - 35 x 94
= 12 x (35 + 50) + 35 x 182 - 35 x 94
= 12 x 35 + 12 x 50 + 35 x 182 - 35 x 94
= (12 x 35 + 35 x 182 - 35 x 94) + 12 x 50
= 35 x ( 12 + 182 - 94) + 600
= 35 x 100 + 6x 100
= 100x (35 + 6)
= 100 x 41
= 4100
182 x 29 + 182 x 45 - 182 x 4 + 182 x 30
= 182 x ( 29 + 45 - 4 + 30 )
= 182 x 100
= 18200
nếu mk đúng mk nhé thanks mn nhìu ạ kb đi
a/ \(x-\dfrac{3}{7}=\dfrac{2}{5}\cdot\dfrac{1}{4}\)
\(x-\dfrac{3}{7}=\dfrac{1}{10}\)
\(x=\dfrac{1}{10}+\dfrac{3}{7}=\dfrac{37}{70}\)
Vậy....
b/ \(x+\dfrac{4}{5}=-\dfrac{5}{12}\cdot\dfrac{3}{25}\)
\(x+\dfrac{4}{5}=-\dfrac{1}{20}\)
\(x=-\dfrac{1}{20}-\dfrac{4}{5}=-\dfrac{17}{20}\)
Vậy....
c/ \(\dfrac{x}{182}=-\dfrac{6}{12}\cdot\dfrac{35}{91}\)
\(\dfrac{x}{182}=-\dfrac{5}{26}\)
\(=>x\cdot26=-5\cdot182\)
\(26x=-910\)
\(x=-910:26=-35\)
Vậy....
a) Ta có: \(x-\dfrac{3}{7}=\dfrac{2}{5}\cdot\dfrac{1}{4}\)
\(\Leftrightarrow x-\dfrac{3}{7}=\dfrac{1}{10}\)
\(\Leftrightarrow x=\dfrac{1}{10}+\dfrac{3}{7}=\dfrac{7}{70}+\dfrac{30}{70}\)
hay \(x=\dfrac{37}{70}\)
Vậy: \(x=\dfrac{37}{70}\)
1,2,3,4 không tính được.
`5)(2x-1/2)^2`
`=(2x)^2-2+(1/2)^2`
`=4x^2-2+1/4`
`6)(x+1/4)^2`
`=x^2+1/2x+1/16`
a, 12 x 35 +35 x 182- 35 x 94
= 35 x ( 12 + 182 - 94 )
= 35 x 100
= 3500
b, 17 x 93 + 116 x 83 + 17 x 23
= 17 x ( 93 +23 ) + 116 x 83
= 17 x 116 + 116 x 83
= 116 x ( 83+17)
= 116 x 100
= 11600
\(\frac{x}{15}=\frac{3}{5}+\frac{-2}{3}\)
\(\frac{x}{15}=\frac{-1}{15}\)
=> \(x=-1\)
\(\frac{x}{182}=\frac{-6}{14}\cdot\frac{35}{91}\)
\(\frac{x}{182}=\frac{-15}{91}\)
=> \(91x=182\cdot\left(-15\right)\)
=> \(91x=-2730\)
=> \(x=-30\)
g, \(\frac{x}{15}=\frac{3}{5}+\frac{-2}{3}\Leftrightarrow\frac{x}{15}=\frac{3}{5}-\frac{2}{3}\Leftrightarrow\frac{x}{15}=-\frac{1}{15}\)
\(\Leftrightarrow x=-1\)
h, \(\frac{x}{182}=\frac{-6}{14}.\frac{35}{91}\Leftrightarrow\frac{x}{182}=-\frac{15}{91}\Leftrightarrow\frac{x}{182}=\frac{-30}{182}\)
\(\Leftrightarrow x=-30\)
26 x 182 + 182 x 47 + 91 x 27 x 2
=26 x 182 + 182 x 47 +(91x2)x27
=26 x 182 + 182 x 47 + 182x27
= 182x(26+47+27)
= 182x100
=18200
26 x 182 + 182 x 47 + 91 x 27 x 2
= 26 x 182 + 182 x 47 + ( 91 x 2) x 27
= 26 x 182 + 182 x 47 + 182 x 27
= 182 x ( 26 + 47 + 27 )
= 182 x 100
= 18200