Question

calcule as somas algébricas
m)1-1+1-1+1
n)-18+12+20-34+51+31

Answer 1

m)
= 1 - 1 + 1 - 1 + 1
=  0  + 0 + 1
= 1

n)
= - 18 + 12 + 20 - 34 + 51 + 31
= - 6 - 14 + 82
= - 20 + 82
= 82 - 20
= 62