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![](https://rs.olm.vn/images/avt/0.png?1311)
3,576 x 100 - 18,57
= 357,9 - 18,57
=339,33
0,7695 x 1000 + 175,96
=769,5 + 175,96
=945,46
5,4 x 2,5 +18,26
=13,5 + 18,26
=31,76
4,27 x 0,2 - 0,17
=0,854 - 0,17
=0,684
3,576 * 100 - 18,57 = 357,6 - 18,57 = 339,03
0,7695 * 1000 + 175,96 = 769,5 + 175,96 = 945,46
5,4 * 2,5 + 18,26 = 13,5 + 18,26 = 37,76
4,27 * 0,2 - 0,17 = 0,854 - 0,17 = 0,684
![](https://rs.olm.vn/images/avt/0.png?1311)
`100:(x+2,5)=2,5`
`=> x+2,5=100:2,5`
`=> x+2,5=40`
`=> x=40-2,5`
`=> x=37,5`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(419:\left(8\times8\times4,18+0,17\times2,5+2,09\times2\times36+0,23\times2,5\right)\)
\(=419:\left(64\times4,18+0,17\times2,5+4,18\times36+0,23\times2,5\right)\)
\(=419:\left[\left(64+36\right)\times4,18+\left(0,17+0,23\right)\times2,5\right]\)
\(=419:\left[100\times4,18+0,4\times2,5\right]\)
\(=419:\left[418+1\right]\)
\(=419:419\)
\(=1\)
\(=\dfrac{419}{64\cdot4.18+0,17\cdot2,5+2,09\cdot72+0,23\cdot2,5}\)
\(=\dfrac{419}{0,4\cdot2,5+64\cdot4,18+2,09\cdot72}\)
\(=\dfrac{419}{1+418}=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
0,7695 x 1000 + 175,96 =769,5+175,96
=945,46
512500 - 14,6 x 1000 =512500 - 14600
=497900
![](https://rs.olm.vn/images/avt/0.png?1311)
12,75 x 2,5 = 31,875
40,5 x 3,23 = 130,815
8,05 x 0,23 = 1,8515
0,17 x 2,8 = 0,476
![](https://rs.olm.vn/images/avt/0.png?1311)
X : 0,2 + X : 0,5 = 4,27
X : ( 0,2 + 0,5) = 4,27
X : 0,7 = 4,27
X = 4,27 x 0,7
X = 2,989
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(2,23\cdot0,1+3,34:10+1:10\cdot4,43\)
\(=2,23\cdot0,1+3,34\cdot0,1+4,43\cdot0,1\)
\(=0,1\cdot\left(2,23+3,34+4,43\right)\)
\(=1\)
b) \(4,5:100+5,4\cdot0,01+1:100\cdot0,1\)
\(=4,5\cdot0,01+5,4\cdot0,01+0,1\cdot0,01\)
\(=0,01\left(4,5+5,4+0,1\right)\)
\(=0,1\)
=356-18,57
=337,43
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