calcule
•
a)(-8)+(+10)-(-3)+(-4)=
b)26-[16-(-5-7)]=
c)20+{-5-[-4(2-7)]-10}=
Soluções para a tarefa
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6
a)(-8)+(+10)-(-3)+(-4)
-8+10+3-4
1
b)26-[16-(-5-7)]
26-[16-(-12)]
26-[16+12]
26-[28]
26-28
-2
c)20+{5-[-4(2-7)]-10}
20+{5-[-4-5]-10}
20+{5-[-9]-10}
20+{5+9-10}
20+{4}
20+4
24
-8+10+3-4
1
b)26-[16-(-5-7)]
26-[16-(-12)]
26-[16+12]
26-[28]
26-28
-2
c)20+{5-[-4(2-7)]-10}
20+{5-[-4-5]-10}
20+{5-[-9]-10}
20+{5+9-10}
20+{4}
20+4
24
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