Sumas algebraicas
a) -6+7-9+4-8+12 =
b) 1+7-8-4+6-10 =
c) 8+(-7)+(-15) =
d) -3+(-5)+7+(-4) =
e) 9+(-1)-(-7) =
f) -3-(+5)-(-7)+(-4) =
g) 6-(-4)+(-3)+(-5) =
h) (4+3)-(4-3)-(4+5 =
i) 8-(3+8-4+6-7-3+4) =​