Question

Calculaţi:
1. 5+(-7)-(-4)-(-6)=
2. -4+(-2)+3-(-5+7-9+1)=
3. 7-(-13+25+4)-(8+13-25)-(-5-3)=
4. 13-(5-17)-(3-10-9+12)-(3-18)=
5. -12-(-14+18-9)-(8-15-5)-(+6+5)=
6. (7+15-28)+(-15+21)-(13-19)=
7. (-8-15+20)-(3+9-7)-(-15+23)=

Answer 1

Răspuns:

Explicație pas cu pas:

5+(-7)-(-4)-(-6)=

= 5 - 7 + 4 + 6 = 8

-4+(-2)+3-(-5+7-9+1)=

= - 4 - 2 + 3 - ( - 6 ) =

= - 4 - 2 + 3 + 6 =

= 3

7-(-13+25+4)-(8+13-25)-(-5-3)=

= 7 - 16 - ( - 4 ) - ( - 8 ) =

= 7 - 16 + 4 + 8 =

= 3

13-(5-17)-(3-10-9+12)-(3-18)=

= 13 - ( - 12 ) - ( - 4 ) - ( - 15 ) =

= 13 + 12 + 4 + 12 =

= 41

-12-(-14+18-9)-(8-15-5)-(+6+5)=

= - 12 - ( - 5 ) - ( - 12 ) - 11 =

= - 12 + 5 + 12 - 11 =

= - 6

(7+15-28)+(-15+21)-(13-19)=

= ( - 6 ) + 6 - ( - 6 ) =

= - 6 + 6 + 6 =

= 6

(-8-15+20)-(3+9-7)-(-15+23)=

= ( - 3 ) - 5 - 8 =

= - 3 - 5 - 8 =

= - 16