Question

Resolva as operações abaixo:

+34+56=
-90+105=
+45-95+120=
+75-80-50+30-40=
150-45+90-15-30+38=
(-35)+(-15)-(-18)=
-(-85)-(+60)-(-20+30)=

​

Answer 1

+34 + 56

= 90

-90 + 105

= 15

+45 - 95 + 120

−50 + 120

= 70

+75 - 80 - 50 + 30 - 40

−5 − 50 + 30 − 40

−55 + 30 − 40

−25 − 40

= −65

150 - 45 + 90 - 15 - 30 + 38

105 + 90 −15 − 30 + 38

195 −15 − 30 + 38

180 − 30 + 38

150 + 38

= 188

(-35) + (-15) - (-18)

−50 − (−18)

= −32

-(-85) - (+60) - (-20 + 30)

85 − 60 − (−20 + 30)

25 − (−20 + 30)

25 −10

= 15