\(-23-24-25+123+124+125\\ =\left(123-23\right)+\left(124-24\right)+\left(125-25\right)\\ =100+100+100\\ =300\)

=(-23+123)+(-24+124)+(-25+125)

=100+100+100

=300

=300

A= 24 + 24 +...+24 + 16 + 16+...+16

A = 24\(\times\) (1+1+...+1) + 16 \(\times\)(1 + 1+1...+1)

A = 24 \(\times\) 84 + 16 \(\times\) 24

A = 24 \(\times\)(84+16)

A = 24 \(\times\) 100

A =2400

A=24x(1+1+...+1)+16x(1+1+1+...+1)

A=24x84+16x24

A=24x(84+16)

A=2400

\(=24\cdot16-24\cdot5-16\cdot24+16\cdot5=-8\cdot5=-40\)

a) (-124) + 24 = -100
b) 37. 78 + 37. 22
=  37 . ( 78 + 22 )
=  37 . 100
= 3700

\(a) (-124) + 24 = -100 b) 37. 78 + 37. 22 = 37 . ( 78 + 22 ) = 37 . 100 = 3700\)

a) (- 124) + 24                                          b) 37 . 78 + 37 . 22

= - ( 124 - 24)                                              =37 . ( 78 + 22)

= - 100                                                        =37 . 100 

                                                                    3700

áp dụng quy tắc đổi dấu

b) 35-19+2019-35-2019=-19+[(35-35)-(2019-2019)]

                                      =-19+0+=-19

a) \(124+\left(-56\right).124+\left(-124\right)\left(-47\right)=124.1-56.124+124.47\)

\(=124.\left(1-56+47\right)=124.\left(-8\right)=-992\)

b) \(35-19+2019-35+\left(-2019\right)=35-19+2019-35-2019\)

\(=\left(35-35\right)+\left(2019-2019\right)-19=0+0-19=0-19=-19\)

c) \(345-150\div\left[\left(3^3-24\right)^2-\left(-21\right)\right]+2020^0\)

\(=345-150\div\left[\left(27-24\right)^2+21\right]+1=345-150\div\left(3^2+21\right)+1\)

\(=345-150\div24+1=345-6,25+1=339,75\)

24(16 - 5) - 16(24 - 5)

= 24.16 - 24.5 - 16.24 + 16.5

= - 24.5 + 16.5 

= 5(-24 + 16)

= 5.8 = 40

\(24\left(16-5\right)-16\left(24-5\right)\)

\(=24.16-24.5-16.24+16.5\)

\(=\left(24.16-24.16\right)+\left(16.5-24.5\right)\)

\(=0+5\left(16-24\right)\)

\(=0+5.\left(-8\right)\)

\(=-40\)

24.(16-5)-16.(24-5)

= 24.16 - 24.5 - 16.24 + 16.5

= 24.( 16 - 16 ) + 5 . ( -24 +16 )

= 24.0 + 5 .( -8 )

= -40

học tốt

Trả lời :

-40

Hok tốt nhé bạn ((:

24.(16-5)-16.(24-5)

=24.16-5-16.24-5

=(24-24).(16-16).(5-5)

=0.0.0

=0

k cho mình nha

24 x (16 - 5) - 16 x (24 - 5)

= 24 x 11 - 16 x 19

= 264 - 304

= -40

Học tốt!!!

   -16+24+16-34

=(-16+16)+(24-34)

=0+(-10)

=10

Trả lời:

-16+24+16+(-34)=[(-16)+16]+[24+(-34)]

                           =0+(-10)

                           =-10

Hok tốt! (^_^)

-16+24+16-34

=(-16+16)+(24+(-34)

=0+-10

=-10