4°) resolva as expressões numéricas :
a)48-{28-4.[3. (40:5-3):(17-3.4)]}+19=
b)(6.8-19+75:15):(4.4:8)=
c)83-{30+[27-(17-9+6)+47]}=
d){3.50+[(4.4+64:16).3].2}:3=
e)168-{68+[32+(15-6+3)]-30}=
me ajudem pfv
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A) =48-{28-4.[3.(8-3):(17-12)]}+19
=48-{28-4.[3.(5):(5)]}+19
=48-{28-4.[3.1]}+19
=48-{28-4.3}+19
=48-{28-12}+19
=48-16+19
=51
B) =(6.8-19+75:15):(4.4:8)
=(48-24):(4.2)
=(24):(8)
=3
=48-{28-4.[3.(5):(5)]}+19
=48-{28-4.[3.1]}+19
=48-{28-4.3}+19
=48-{28-12}+19
=48-16+19
=51
B) =(6.8-19+75:15):(4.4:8)
=(48-24):(4.2)
=(24):(8)
=3
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