Question

Bài 4:Thực hiện phép tính:

a)(-25)-(-17)+24-12

b)4.(15-18)-(3-5).3²

Answer 1

a) (-25)-(-17)+24-12

=(-25)+17+24-12

=(-25)+(17+24-12)

=(-25)+29

=29-25=4

b) 4.(15-18)-(3-5)3^2

=4.(-3)-2.9

=-12-18

=-(12+18)=-30

Answer 2

a/ 

(-25)-(-17)+24-12

 

= -8 + 12

 

= 4

 

b/

4.(15-18)-(3-5).3²

 

^{= 4.(-3)-(-2).9}

^{= -12 -  (-18)}

^{= 6}