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27 . 75 + 25 .27 - 150
= 27 . ( 25 + 75 ) - 150
= 27 . 100 -150
= 2700 - 150
= 2550
![](https://rs.olm.vn/images/avt/0.png?1311)
\(27.25+25.27-150\)
\(=27\left(25+75\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
27*75+25*27-150
= 27 * ( 75 + 25 ) - 150
= 27 * 100 -150
= 2700 - 150
= 2550
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 27.75+25.27-150
= 27.(75+25)-150
= 27.100-150
= 2550
b) 12:{390:[500-(125+75.7)]}
= 12:{390:(500-25.26)}
= 12:{390:[25.(20-26)]}
= 12:(390:(-150)]}
= 12 : \(\dfrac{-13}{5}\)
= \(\dfrac{-60}{13}\)
a)27.75+25.27-150=27.(75+25)-150=27.100-150=2700-150=26850
b)\(12:\left\{390:\left[500-\left(25.5+25.3.7\right)\right]\right\}\)
\(=12:\left\{390:\left[25.20-25.26\right]\right\}\)
\(=12:\left\{3.10.13:\left[-25.6\right]\right\}\)
\(=12:\left(\dfrac{-13}{5}\right)=-12.\dfrac{5}{13}=\dfrac{-60}{13}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
= 25. (75+27) - 150
= 25.102 - 150
= 2550 -150
=240
![](https://rs.olm.vn/images/avt/0.png?1311)
27 x 75 + 25 x 27 -150
=27 x (75+25) - 150
= 2700-150
= 2550
K cho Mk nha!!
27 x 75 + 25 x 27 - 150
= 27 x [ 75 + 25 ] - 150
= 2700 - 150
= 2550
![](https://rs.olm.vn/images/avt/0.png?1311)
b) 2.2.2.3.3.62.3 = 2.2.2.3.3.6.6.3 = 2.2.2.3.3.3.2.3.2.3 = 25.35
![](https://rs.olm.vn/images/avt/0.png?1311)
27 . 75 + 25 . 27 - 150
= 27 . ( 75 + 25 ) - 150
= 27 . 100 - 150
= 2700 - 150
= 2550
![](https://rs.olm.vn/images/avt/0.png?1311)
a)39 . 213 + 87 . 39
=39 . (213 + 87 )
=39 . 300
= 11700
b)27 . 75 + 25 . 27 - 150
=27 . (75 + 25) - 150
=27 . 100 - 150
= 2700 - 150
= 2550
a) Ta có: \(39.213+87.39=39.\left(213+87\right)\)
\(=39.300\)
\(=11700\)
b) Ta có: \(27.75+25.27-150=27.\left(75+25\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
![](https://rs.olm.vn/images/avt/0.png?1311)
27 . 75 + 25 . 27 - 150
= 27.(75+25)-150
= 27.100-150
= 2700 - 150
= 2550
20 - [ 30 - ( 5 - 1 )2 ]
= 20 -[30-42 ]
= 20 - ( 14 )
= 6
bằng 2550
Bằng 2550 ík