Calcule o valor das expressãoes a)15+[6+(8÷2)]=
b)40-[3+(10-2)÷2]=
c)[30+2×(5-3)]×2-10=
d)10+[4+(7×3+1)]-3 =
e)16+[10-(18÷3+2)+5]=
f)25-[12-(3×2+1)]=
g)90-[25+(5×2-1)+3]=
h)45+[(8×5-10÷2)+(18÷6-2)]=
i)50-2×{7+8÷2-[9-3×(5-4)]}=
j)100-3×{5+8÷2[3×(7-6)]}=
k)1000-[(2.4-6)+(2+6.4)]=
l)60+2{[4.(6+2)-10]+12}=
m)[(4+16.2).5-10].100=
n){10+[5.(4+25)-8].2}-100=
o)80-5(28-6.4)+6-3.4=
Soluções para a tarefa
15+6+4
15+10
= 25
B)40-[3+(10-2)÷2]
40 − ( 3+ 4)
40 − 7
= 33
C)[30+2×(5-3)]×2-10
(30+(2)(2))(2)−10
(30+4)(2)−10
(34)(2)−10
68−10
= 58
D)10+[4+(7×3+1)]-3
10+4+21+1−3
10+4+22−3
10+26−3
36−3
= 33
E)16+[10-(18÷3+2)+5]
16+10−(6+2)+5
16+10−8+5
16+2+5
16+7
= 23
F)25-[12-(3×2+1)]
25−(12−(6+1))
25−(12−7)
25−5
= 20
G)90-[25+(5×2-1)+3]
90−(25+10−1+3)
90−(25+9+3)
90−(34+3)
90−37
= 53
H)45+[(8×5-10÷2)+(18÷6-2)]
45 + 40 - 10/2 + 18/6 - 2
45 + 40 - 5 + 18/6 - 2
45 + 35 + 18/6 -2
45 + 35 + 3 - 2
45 + 35 - 1
45 + 36
= 81
I)50-2×{7+8÷2-[9-3×(5-4)]}
50−2(7+4−(9−3(5−4)))
50−2(11−(9−3(5−4)))
50−2(11−(9−(3)(1)))
50−2(11−(9−3))
50−2(11−6)
50−(2)(5)
50−10
= 40
J)100-3×{5+8÷2[3×(7-6)]}
100−3(5+4(3(7−6)))
100−3(5+4(3)(1))
100−3(5+(4)(3))
100−3(5+12)
100−(3)(17)
100−51
= 49
K)1000-[(2×4-6)+(2+6×4)]
1000−(8−6+2+(6)(4))
1000−(2+2+(6)(4))
1000−(2+2+24)
1000−(2+26)
1000−28
= 972
L)60+2{[4×(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
M)[(4+16×2)×5-10]×100
((4+32)(5)−10)(100)
((36)(5)−10)(100)
(180−10)(100)
(170)(100)
= 17000
N){10+[5×(4+25)-8]×2}-100
10+((5)(29)−8)(2)−100
10+(145−8)(2)−100
10+(137)(2)−100
10+274−100
284−100
= 184
O)80-5(28-6×4)+6-3×4
80−5(28−24)+6−(3)(4)
80−(5)(4)+6−(3)(4)
80−20+6−(3)(4)
60+6−(3)(4)
66−(3)(4)
66−12
= 54
Resposta:
Calcule o valor das expressões:
a)
= 15+[6+(8÷2)]
= 15 +[6+4]
= 15+10
= 25
b)
= 40-[3+(10-2)÷2]
= 40 - [3 + 8 : 2]
= 40 - [ 3 + 4]
= 40 - 7
= 33
c)[30+2×(5-3)]×2-10
= [30 + 2.2]. 2- 10
= [30 + 4]. 2 - 10
= 34.2 - 10
= 68 - 10
= 58
d)
= 10+[4+(7×3+1)]-3
= 10 + [4 + (21+1)] - 3
= 10 + [4+22] - 3
= 10 + 26 - 3
= 36 - 3
= 33
e)
= 16+[10-(18÷3+2)+5]
= 16 + [10 - (6+2) + 5]
= 16 + [10 - 8 +5]
= 16 + 7
= 23
f)
= 25-[12-(3×2+1)]
= 25 - [ 12 - (6+1)]
= 25 - [12 - 7]
= 25 - [5]
= 20
g)
= 90-[25+(5×2-1)+3]
= 90 - [ 25+(10-1)+3]
= 90 - [ 25+9+3]
= 90 - 37
= 53
h)
= 45+[(8×5-10÷2)+(18÷6-2)]
= 45+[(40-5)+(3-2)]
= 45+[35+1]
= 45+36
= 81
i)
=50-2×{7+8÷2-[9-3×(5-4)]}
=50- 2.{7+4-[9 - 3.1]}
=50 - 2.{ 7+4 - [9-3]}
=50 - 2.{11 - 6}
= 50 - 2.5
= 50 - 10
= 40
j)
= 100-3×{5+8÷2[3×(7-6)]}
= 100 - 3.{5+4.[3.1]}
= 100 - 3.{5 + 4. 3}
= 100 - 3.{5 + 12}
= 100 - 3.17
= 100 - 51
=49
k)
= 1000-[(2.4-6)+(2+6.4)]
= 1000 - [(8-6)+( 2+24)]
= 1000 - [ 2+ 26]
= 1000 - 28
= 972
l)
= 60+2{[4.(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
m)
= [(4+16.2).5-10].100
= [(4+32).5 - 10]. 100
= [36.5- 10]. 100
= [180 - 10]. 100
= 170.100
= 17000
n)
= {10 + [5.(4+25)-8].2}-100
={10 +[5.29 - 8]. 2} - 100
= { 10 + [145 - 8]. 2} - 100
={ 10 + 137.2} - 100
={ 10 + 274}- 100
= 284 - 100
= 184
o)
= 80-5(28-6.4)+6-3.4
= 80 - 5.(28-24)+6-12
= 80 - 5.4 - 6
= 80 - 20 - 6
= 60 - 6
= 54