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A, 1125 - ( 347 + 1125 ) + ( -65 +347 )
= 1125 - 347 -1125 + ( -65 ) +347
= ( 1125 -1125 )+( 347 - 347 ) + ( -65 )
= 0 + 0 + ( -65 )
= -65
b, -23 . 63 + 23 . 21 - 58
= -23 . ( - 1 ) . 63 + 23 . 21 - 58
= 23 . ( -63 ) + 23 . 21 - 58
= 23 . ( -63 ) + 23 . ( -37 )
= 23 . [ ( -63 ) + ( -37 ) ]
= 23 . ( -100 )
= - 2300.
c, - 2003 + ( -21 + 75 + 2003 )
= 2003 + ( -21 ) + 75 + 2003
= 2003 . 2 + [ ( -21 ) + 75 ]
= 4006 + 54
= 4060
Tick mình nha bạn yêu
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a. 137-(-23)=137+23=160
b.\(3^3.75+25.3^3-34=3^3.\left(25+75\right)-34=27.100-34=2700-34=2666\)
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135--65+23-(10+23)
=135+65+23-10-23
=(135+65)+(23-23)-10
=200+0-10
=190
![](https://rs.olm.vn/images/avt/0.png?1311)
-23. 63. + 23. 21- 58 .23
= 23 ( -63 + 21 - 58 )
= 23 . -100
= - 2300
hok tốt!!
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(-23.63+23.21-58.23\)
\(=23.\left(-63+21-58\right)\)
\(=23.\left(-100\right)\)
\(=-2300\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-23 . 63 + 23 . 21 - 58 . 23
= 23 . ( -63 ) + 23 . 21 - 58 . 23
= 23 . [ ( -63 ) + 21 - 58 ]
= 23 . ( -100 )
=-2300
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 5.52 - 5.5 +23.5=5.(52-5+23)=140 các câu còn lại tương tự nhé
-23 . 63 + 23 . 21 - 58 . 23
= 23.(-63+21-58)
=23.(-100)
=-2300
Trả lời:
\(-23.63+23.21-58.23\)
\(=23.\left(-63+21-58\right)\)
\(=23.\left(-100\right)\)
\(=-2300\)
Hok tốt!
Vuong Dong Yet