e) 124 x 31 1. Resolva as expressões numéricas abaixo: a) [30 + 2x (5-3)] x 2-10 = b) 9+ [4+2 x (6-4) + (2+5)]- 8 = c) {10+ [5 x (4 + 2 x 5)-8] x 2} - 100 = d) 60 + 2 x {[4 x (6 + 2) - 10] + 12} = e) 1000 - [(2 x 4-6) + (2 + 6 x 4)] = f) [40+2x (7-5)] x2-20 = g) 80-5x (28-6 x 4) + 6 - 3 x 4 = e ) 124 x 31 1. Resolva as expressões numéricas abaixo : a ) [ 30 + 2x ( 5-3 ) ] x 2-10 = b ) 9+ [ 4 + 2 x ( 6-4 ) + ( 2 + 5 ) ] - 8 = c ) { 10+ [ 5 x ( 4 + 2 x 5 ) -8 ] x 2 } - 100 = d ) 60 + 2 x { [ 4 x ( 6 + 2 ) - 10 ] + 12 } = e ) 1000 - [ ( 2 x 4-6 ) + ( 2 + 6 x 4 ) ] = f ) [ 40 + 2x ( 7-5 ) ] x2-20 = g ) 80-5x ( 28-6 x 4 ) + 6 - 3 x 4 =
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Explicação passo-a-passo:
1. Resolva as expressões numéricas abaixo:
a) [30 + 2x (5-3)] x 2-10 =
[30+2.(2)].2-10=
[30+4].2-10=
[34].-8=
−272
b) 9+ [4+2 x (6-4) + (2+5)]- 8 =
9+[4+2.(2)+(7)]-8=
9+[4+4+7]-8=
9+[8+7]-8=
9+[15]-8=
24-8=
16
c) {10+ [5 x (4 + 2 x 5)-8] x 2} - 100 =
{10+[5.(4+10)-8].2}-100=
{10+[5.(14)-8].2}-100=
{10+[70-8].2}-100=
{10+[62].2}-100=
{10+124}-100=
{134}-100=
34
d) 60 + 2 x {[4 x (6 + 2) - 10] + 12} =
60+2.{[4.(8)-10]+12}=
60+2.{[32-10]+12}=
60+2.{[22]+12}=
60+2.{34}=
60+68=
128
e) 1000 - [(2 x 4-6) + (2 + 6 x 4)] =
1000-[(2.-2)+(2+24)]=
1000-[(-4)+(26)]=
1000-[22]=
978
f) [40+2x (7-5)] x2-20 =
[40+2.(2)].2-20=
[40+4].2-20=
[44].-18=
−792
g) 80-5x (28-6 x 4) + 6 - 3 x 4 =
80-5.(28-24)+6-12=
80-5.(4)+(-6)=
80-20+(-6)=
80-14=
66
e ) 124 x 31 1= 38564
Espero ter ajudado ♥️.