Question

Efectuati: -9-(-6)+8
-1-(+3)-6
+12-(-9)-2
+6-(-4)+10
-21-(+17)-(2)
0-(-8)-(+8)
+11-(-9)-(+5)
4-(+3)+(-7)
0-(+9)+(-9)
-6-[(-4)-(-5)]
-4-[(+10)+3]
-[9-(-9)]-5

Answer 1

Răspuns:

$- 9 - ( - 6) + 8 = \\ - 9 + 6 + 8 = \\ - 3 + 8 = \\ 5$

$- 1 - ( + 3) - 6 = \\ - 1 - 3 - 6 = \\ - 4 - 6 = \\ - 10$

$+ 12 - ( - 9) - 2 = \\ + 12 + 9 - 2 = \\ 21 - 2 = \\ 19$

$+ 6 - ( - 4) + 10 = \\ + 6 + 4 + 10 = \\ 10 + 10 = \\ 20$

$- 21 - ( + 17) - 2 = \\ - 21 - 17 - 2 = \\ - 38 - 2 = \\ - 40$

$0 - ( - 8) - ( + 8) = \\ 0 + 8 - 8 = \\ 0$

$+ 11 - ( - 9) - ( + 5) = \\ + 11 + 9 - 5 = \\ 20 - 5 = \\ 15$

$4 - ( + 3) + ( - 7) = \\ 4 - 3 + 7 = \\ 1 + 7 = \\ 8$

$0 - ( + 9) + ( - 9) = \\ 0 - 9 + 9 = \\ - 9 + 9 = \\ 0$

$- 6 - ( - 4 + 5) = \\ - 6 - ( + 1) = \\ - 6 - 1 = \\ - 7$

$- 4 - (13) = \\ - 4 - 13 = \\ - 17$

$(9 + 9) - 5 = \\ 18 - 5 = \\ 13$