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25.(32+47)+32.(25-47)
= -(25.32+25.47)+(32.25-32.47)
= -25.32+32.47 + 32.25-32.47
= (-25.32+32.25)-(25.47+32.47)
= 0 - 47.(25+32)
= -47.57
= -2649
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Đề:25.(32-47)-32.(25-47)
=25.(-15)-32.(-22)
=-375-(-704)
=329
Dấu . là nhân nha
\(25\cdot\left(32-47\right)-32\cdot\left(25-47\right)=25\cdot32-25\cdot47-32\cdot25+32\cdot47=\left(25\cdot32-32\cdot25\right)+\left(32\cdot47-25\cdot47\right)=0+47\cdot\left(32-25\right)\)
\(=47\cdot7=409\)
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25.(32 + 47) - 32.(25 - 47)
= 25.32 + 25.47 - 32.25 - 32.47
= (25.32 - 32.25) + 25.47 - 32.47
= 0 + 47.(25 - 32)
= 47. (-7)
= -329
25.32+25.47-32.25+32.47
(25-25).32+25.47+32.47
0+25.47+32.47
(25+32).47
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a.
\(-\left(-315\right)+\left(-115\right)-105+25=315-115-105+25=120\)
b.
\(888-\left(-333\right)-222+70=888+333-222+70=1069\)
c.
\(25\times\left(32+47\right)-32\times\left(25+47\right)=25\times32+25\times47-32\times25-32\times47=-47\times\left(32-25\right)=-47\times7=-329\)
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a/ 25 x ( 32 + 47 ) - 32 x ( 25 + 47 )
= 25 x 79 - 32 x 72
= 1975 - 2304
= -329
b/ 48 x ( 21- 19 ) - 21 x ( 48 - 19 ) + 27 x ( -81 )
= 48 x 2 - 21 x 29 + 27 x ( -81 )
= 96 - 609 + -2187
= -2700
cau co phai vu phuong huyen ko.Neu phai thi cau hay vao ket ban voi to
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(31\cdot72+\left(-31\right)\cdot70-2\cdot70\)
\(=31\cdot72-31\cdot70-2\cdot70\)
\(=31\cdot\left(72-70\right)-2\cdot70\)
\(=31\cdot2-2\cdot70\)
\(=2\cdot\left(31-70\right)\)
\(=2\cdot-39\)
\(=-78\)
b) \(25\cdot\left(32+17\right)-32\cdot\left(25+47\right)\)
\(=25\cdot32+25\cdot17-32\cdot25-32\cdot47\)
\(=25\cdot\left(32-32+17\right)-32\cdot47\)
\(=25\cdot17-32\cdot47\)
\(=425-1504\)
\(=-1079\)
25.(32+47)-32.(25+47)
= 25.32 + 47.25 - 32.25 +47.32
= 32,(25-25) + 47.(25-32)
= 47.(-7)
= -329
=25.79-32.72
=1975-2304
=-329