2014*20,14=20,14+2014*m.vậy M là gì
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
25x20,14+4+2014-20,14x203,3+2014x20,04
= 503,5+4+2014-4094,462+40360,56
= 507,5+2014+40360,56-4094,462
= 2521,5+40360,56-4094,462
= 42882,06-4094,462
= 38787,598
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 99,7x20,14 + 2014% x0,3
=99,7 x 20,14 + 2014:100 x0,3
= 99,7 x 20,14 + 20,14 x 0,3
=20,14x (99,7 + 0,3)
= 20,14 x100
= 2014
b) 7,85:0,25+1,15x4+4
=7,85x4+1,15X4+4x1
=(7,85+1,15+1)x4
= 10 x 4
= 40
a, 99,7 x 20,14 +2014 x0,3
= 0,997 x 100 x 20,14 + 2014 x 0,3
=0,977 x 2014 +2014 x 0,3
=2014 x( 0,997 +0,3)
=2014 x 1,297
=2612,158
b,7,85 : 0,25 +1.15 x 4 + 4
=7,85 :\(\frac{1}{4}\)+ 1.15 x 4 + 4
=7,85 x 4 +1.15 x4 + 4
= 4 x( 7,85 + 1.15+1)
=4 x 10
= 40
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
20,14+20,14+20,14 x 8-20,14 x 10
=20,14 x (1+1+8)-20,14 x 10
=20,14 x 10-20,14 x 10
=20,14 x (10-10)
=20,14 x 0
=0
![](https://rs.olm.vn/images/avt/0.png?1311)
\(20,14\times3+20,14\div0,2+20,14\div0,5\)
\(=20,14\times3+20,14\div\dfrac{1}{5}+20,14\div\dfrac{1}{2}\)
\(=20,14\times3+20,14\times5+20,14\times2\)
\(=20,14\times\left(3+5+2\right)\)
\(=20,14\times10\)
\(=201,4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
20,14 x 9 + 20,14 x 5 - 20,14 x 9
=20,14 x (9 + 5 - 9)
=20,14 x 5
=100,7
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có : 20,14 x 98,8 + 20,14 x 0,2 + 20,14
= 20,14 x ( 98,8 + 0,2 + 1 )
= 20,14 x 100
= 20,14 x 100
= 2014
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,20,14\times102-20,14:0,5\\= 20,14\times102-20,14\times2\\ =20,14\times\left(102-2\right)\\ =20,14\times100\\ =2014\\ b,0,8\times9,6+1,6\times2\\ =0,8\times1,6\times6+1,6\times2\\ =1,6\times\left(6+2\right)\times0,8\\ =1,6\times8\times0,8\\ =12,8\times0,8\\ =10,24\)
Vậy số M là 1