Question

calcule

-(-7)+(+15)-(+32)+(-40)-(-25)+(+40)=


- 497-(-801)+(-92)+(-55)+(-2)-(+1)=​

Answer 1

• obs:

(-).(-)=+

(+).(+)=+

(+).(-)=-

a)+7+15-32-40+25+40= +15

b)-497+801-92-55-2-1= +154