Question

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

Answer 1

a)
= 48-{28-4.[3. (40:5-3):(17-3.4)]}+19
= 48 - {28-4.[3.(8-3):(17-12)]}+19
= 48 - {28-4.[3.5 : 5]} + 19
= 48 - {28-4.[15:5]} + 19
= 48 - {28-4.3} + 19
= 48 - {28-12} + 19
= 48 - 16 + 19
= 48 + 3
= 51

b)
= (6.8-19+75:15):(4.4:8)
= (48 - 19 + 5) : (16:8)
= (48-14) : 2
= 34 : 2
= 17

c)
= 83-{30+[27-(17-9+6)+47]}
= 83 - {30+[27-(14)] + 47]}
= 83 - {30+ [27-14] + 47}
= 83 - {30 + 13 + 47}
= 83 - { 43 + 47}
= 83 - { 90}
= 83 - 90
= - 7

d)
= {3.50+[(4.4+64:16).3].2}:3
= {150 + [(16+4).3].2} : 3
= {150 + [20.3].2} : 3
= {150 + 60.2] : 3
= { 150 + 120} : 3
= 270 : 3
= 90

e)
= 168 - {68 + [32+(15-6+3)]-30}
= 168 - {68+[32+(12)] - 30}
= 168 - {68+44 - 30}
= 168 - {68 + 14}
= 168 - 82
= 86