Respuesta:
a. -19
b. 16
c. -2
d. 3
e. 0
Explicación paso a paso:
[tex]a. (-2)+(-5)+(-12) \\ -2-5-12 \\ -7-12 \\ -19[/tex]
[tex]b.(+3)+(+6)+(+7) \\3+6+7 \\ 9+7 \\ 16[/tex]
[tex]c. (-9)+(+7) \\ -9+7 \\ -2[/tex]
[tex]d. (-12)+(+15) \\ -12+15 \\ 3[/tex]
[tex]e. (+13)+(-13)+(15 )+(-15) \\ +13-13+15-15 \\ 0[/tex]
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Respuesta:
a. -19
b. 16
c. -2
d. 3
e. 0
Explicación paso a paso:
[tex]a. (-2)+(-5)+(-12) \\ -2-5-12 \\ -7-12 \\ -19[/tex]
[tex]b.(+3)+(+6)+(+7) \\3+6+7 \\ 9+7 \\ 16[/tex]
[tex]c. (-9)+(+7) \\ -9+7 \\ -2[/tex]
[tex]d. (-12)+(+15) \\ -12+15 \\ 3[/tex]
[tex]e. (+13)+(-13)+(15 )+(-15) \\ +13-13+15-15 \\ 0[/tex]