Question

calcule mentalmente
a ) -6+18+6-4+4+1 =
b ) 4-9+2-1+9-2
c) 5+6-7+1+7-10
d) 12-6+5-5+6-12


ajuda mim por favor

Answer 1

a) -6+18+6-4+4-1
=17

b) 4-9+2-1+9-2
12-17
=3

c) 5+6-7+1-10
=-5
d) 12-6+5+6-12
=5