Question

8. Calculați:
b)
(-3+8)-(-9);
d) 8 (-15)-(5-10).(-6);
a)-5-(-12)+7-(-10);
c) (8-11)-(7-5);
e) (5-7-9).(7-9-12); (-2022+2021)-(-2020+2019).

Answer 1

Răspuns:

a. -5-(-12)+7-(-10)= 24

b. (-3+8)-(-9)= 5+9= 14

c. (8-11)-(7-5)= -3-2= -5

d. 8×(-15)-(5-10)×(-6)= -120+5×(-6)= -120-30= -150

e. (5-7-9)×(7-9-12):(-2022+2021)-(-2020+2019)=

-11×(-14):(-1)-(-1)= -154-(-1)= -153