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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
X x 6,2 + X x 3,8 = 201,7
X x (6,2+3,8) = 201,7
X x 10 = 201,7
X = 201,7 : 10
X = 20,17
X x 6,2 + X x 3,8 = 201,7
Xx(6,2+3,8)=201,7
Xx10=201,7
X=201,7:10
X=20,17
![](https://rs.olm.vn/images/avt/0.png?1311)
\(3,7\times3,8+6,2\times3,7\\ =3,7\times\left(3,8+6,2\right)\\ =3,7\times10\\ =37\\ 56,8\times76,9-56,8\times76,8\\ =56,8\times\left(76,9-76,8\right)\\ =56,8\times0,1\\ =5,68\)
![](https://rs.olm.vn/images/avt/0.png?1311)
7,75 x 3,8 + 7,75 x 6,2
= 7,75 x ( 3,8 + 6,2 )
= 7,75 x 10
= 77,5
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(2,8\times19,35-2,8\times19,35\)
\(=2,8\times\left(19,35-19,35\right)\)
\(=2,8\times0\)
\(=0\)
b) \(56,08\times93,23-56,08\times83,23\)
\(=56,08\times\left(93,23-83,23\right)\)
\(=56,08\times10\)
\(=560,8\)
c) \(1,3856\times194-1,3856\times94\)
\(=1,3856\times\left(194-94\right)\)
\(=1,3856\times100\)
\(=138,56\)
d) \(28,524\times3,8+28,524\times6,2\)
\(=28,524\times\left(6,2+3,8\right)\)
\(=28,524\times10\)
\(=285,24\)
c) \(101\times0,128-0,128\)
\(=0,128\times\left(101-1\right)\)
\(=0,128\times100\)
\(=12,8\)
a: =2.8*(19,35-19,35)=0
b: =56,08(93,23-83,23)
=10*56,08=560,8
c: =1,3856(194-94)
=1,3856*100
=138,56
d: =28,524*(3,8+6,2)
=28,524*10
=285,24
e: =0,128*100
=12,8
![](https://rs.olm.vn/images/avt/0.png?1311)
6,2 x X +X x 3,8=43,18-18,8
X x(6,2+3,8)=25
X x 10=25
X =25:10
X=2,5
vậy X = 2,5
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
201,7 x 8,02 +201,7 : 4/3 + 201,7 x 1,98 - 0,75 x 201,7
=(201,7 x 8,02 +
201,7 x 1,98)+
(201,7 : 4/3 -0,75x201,7)
=(201,7x10)+(201,7.3/4-3/4x201,7)
=2017+0
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
201,7 x 8,02 + 201,7 : \(\frac{4}{3}\)+ 201,7 x 1,98 - 0,75 x 201,7
= 201,7 x 8,02 + 201,7 x \(\frac{3}{4}\)+ 201,7 x 1,98 - 0,75 x 201,7
= 201,7 x ( 8.02 + \(\frac{3}{4}\)+ 1,98 - 0,75)
= 201,7 x ( 8,02 + 1,98, + \(\frac{3}{4}\)- 0,75)
= 201,7 x 10
= 2017
X x 6,2 + X x 3,8 = 201,7
X x (6,2+3,8) = 201,7
X x 10 = 201,7
X = 201,7 : 10
X = 20,17