Question

THỰC HIỆN PHÉP TÍNH :

( 45 - 25 ) . ( -11 ) + 29 . ( -3 - 17 ) 

( -37 ) . ( 55 - 23 ) - 55 . ( 23 - 37 ) 

( -12 ) . ( -125 ) . ( -4 )

( -1 ) . 2 . ( -3 ) . 4 . ( -5 ) 

giúp mình với !

 

 

Answer 1

DẤU '' . '' LÀ DẤU NHÂN

Answer 2

*\(\left(45-25\right).\left(-11\right)+29.\left(-3-17\right)\)

\(=20.\left(-11\right)+29.\left(-20\right)\)

\(=-220+\left(-580\right)\)

\(=-800\)

*\(\left(-37\right).\left(55-23\right)-55.\left(23-37\right)\)

\(=-37.32-55.\left(-14\right)\)

\(=-1184-\left(-770\right)\)

\(=-1184+770\)

\(=-414\)

*\(\left(-12\right).\left(-125\right).\left(-4\right)\)

\(=1500.\left(-4\right)\)

\(=-6000\)

*\(\left(-1\right).2.\left(-3\right).4.\left(-5\right)\)

\(=-2.\left(-12\right).\left(-5\right)\)

\(=24.\left(-5\right)\)

\(=-120\)

Answer 3

A) ( 45 - 25 ) . ( -11 ) + 29 . ( -3 - 17 ) 

=   20.  ( -11 ) + 29 .  (-20)

= -20.( -11  + 29)

=-20.18

= -260

B)