+ (3) + (+2) = +3+2 = +5

+ (3) + (+2) = +3+2 = +5

+ (3) + (-2) = +3 2 = +1

+ (3) (+2) = +3 2 = +1

+ (3) (-2) = +3 + 2 = +5Ejercicios

3 (+2) +5 7 = 3 2 + 5 7 =

= 3+5 - 7-2

= +8 9

= -1

-9 3 + (-4) (-7)= -9 3 4 + 7

= (-9 -3 -4) - +7

= -16 +7

= -9

- (-3) +(+2) (+5) (-6)= +3 + 2 5 + 6= +11 5 = +6

1+ (8 1 - 5) (3 -10)

1+ 8 1 5 3 + 101+ 8 + 10 1 5 3+19 9 = +10

10 [ ( 6 8 ) (4 7)]=

10 [6 - 8 4 + 7]=

10 6 + 8 + 4 7=10+ 8 + 4 7 6 =

+22 13 = +9

(2 + 2 + 2) * (1 + 1 + 1)

6 * 3 = +18

a) 6 + - 7 (- 8) + 4 2 =

6 + - 7 8 + 4 2=

6-7 + 8 + 4 -2 =

6+8+4-2-7=

18-9=+9