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20,05x14+40,1x16+60,15x18
=20,05x14+20,05x2x16+20,05x3x18
=20,05x14+20,05x32+20,05x54
=20,05x(14+32+54)
=20,05x100
=2005
![](https://rs.olm.vn/images/avt/0.png?1311)
2,15 : 0,1 + 2,15 x 7 + 2,15 : 0,5 + 2,15
=2,15 x 10 + 2,15 x 7 + 2,15 x2 + 2,15 x 1
=2,15 x ( 10 + 7 + 2 + 1 )
= 2,15 x 20
= 43
OK CHÚC BẠN HỌC TỐT !!!
=2,15 x 10 + 2,15 x 7 + 2,15 x 2 + 2,15 x 1
=2,15 x (10+7+2+1)
=2,15 x 20 = 43
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2,15\times123,06-2,15\times23,06+17,8\)
\(=2,15\times\left(123,06-23,06\right)+17,8\)
\(=2,15\times100+17,8\)
\(=215+17,8\)
\(=232,8\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`2,15 xx 132,06 -2,15 xx 23,06 + 17,85`
`=2,15 xx(132,06 -23,06 )+ 17,85`
`=2,15 xx109+ 17,85`
`=234,35+ 17,85`
`=252,2`
![](https://rs.olm.vn/images/avt/0.png?1311)
20,05x14+40,1x16+60,15x18
=20,05x14+20,05x2x16+20,05x3x18
=20,05x14+20,05x32+20,05x54
=20,05x(14+32+54)
=20,05x100
=2005
20,05x14+40,1x16+60,15x18
=20,05x14+20,05x2x16+20,05x3x18
=20,05x14+20,05x32+20,05x54
=20,05x(14+32+54)
=20,05x100
=2005
![](https://rs.olm.vn/images/avt/0.png?1311)
4,3 * 6,5 + 2,15 * 37 + 2,15 * 27 - 2,15
= 2,15 * 13 + 2,15 * 37 + 2,15 * 27 - 2,15
= 2,15 * ( 13 + 37 + 27 - 1 )
= 2,15 * 76
= sai đề
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2,15+0,763:0,7\)
\(=2,15+1,09=3,24\)
b,\(8,64:\left(1,46+3,34\right)\)
\(=8,64:4,8=1,8\)
Học tốt
a ) 2,15 + 0,763 : 0,7
= 2,15 + 1,09
= 3,24
b ) 8,64 : ( 1,46 + 3,34 )
= 8,64 : 4,8
= 1,8
![](https://rs.olm.vn/images/avt/0.png?1311)
Cách 1: (2,15 + 3,85) x 1,2
= 6 x 1,2
= 7,2
Cách 2: (2,15 + 3,85) x 1,2
= 2,15 x 1,2 + 3,85 x 1,2
= 2,58 + 4,62
= 7,2
![](https://rs.olm.vn/images/avt/0.png?1311)
=8,6 X 3,7 +4,3 X 2 X3,8+2,5X8,6
=8,6 X 3.7 + 8,6 X 3,8 +8,6X2,5
=8,6X(3,7+3,8+2,5)
=8,6X10
=86
![](https://rs.olm.vn/images/avt/0.png?1311)
\(60,15-34x2,15\)
\(=2045,1x2,15\)
\(=4396,965\)
\(HT!\)
\(@Kaito\)\(Kid\)
TL
60,15 -34 X 2,15
=60,15 -73,1
=-12,95
HT
K CHO MIK