Question

resolva as somas algébricas


a)14-(-10+5+3)=
R=



b)-15+[-4-(-5+20)]
R=




c)12+{-2+[-3-(-2+1)]}

Answer 1

A)14-(-10+5+3)=
14-(-2)
14+2
16

B)-15+(-4-(-5+20))
-15+(-4-(-5+20))
-15+(-19)
-15-19
34

C)12+(-2+(-3-(-2+1)))
12+(-2+(-3-(-1)))
12+(-2+(-3+1))
12+(-2+(-2))
12+(-2-2)
12+(-4)
12-4
8