Resolva as expressões numéricas abaixo (Transcreva e resolva no seu caderno): a) 7 – ( 1 + 3) = b) 9 – ( 5 – 1 + 2) = c) 10 – ( 2 + 5 ) + 4 = d) ( 13 – 7 ) + 8 – 1 = e) 15 – ( 3 + 2) – 6 = f) ( 10 – 4 ) – ( 9 -8) + 3 = g) 50 – [ 37 – ( 15 – 8 ) ] = h) 28 + [50 – (24 – 2) -10 ] = i) 20 + [ 13 + (10 – 6) + 4] = j) 52 – { 12 + [ 15 – ( 8 – 4)]} = k) 25 + { 12 + [ 2 – ( 8 – 6 ) + 2 ]} = l) { [ ( 18 – 3 ) + ( 7 + 5) – 2 ] + 5 } – 12 = m) 65 – { 30 – [ 20 – ( 10 – 1 + 6) + 1 ]} = n) 45 + { 15 – [ ( 10 – 8 ) + ( 7 – 4) – 3 ] – 4 } = o) 40 + { 50 – [35 – ( 25 +5) – 1 ]} + 7 = p) 38 – { 20 – [ 22 – ( 5 + 3) + ( 7 – 4 +1)]} = q) 26 + { 12 – [ ( 30 – 18) + ( 4 – 1) – 6 ] – 1 } = r) 25-[10 + (7 - 4)] = s) 32+ [10-(9-4)+8] = t) 45-[12-4+(2+1)] = u) 5² + 2³ - 2 x (3 + 9) = v) 6² : 3² + 4 x 10 – 12 = w)(7² - 1 ) : 3 + 2 x 5 = x) 4²- 10 + (2³ - 5) = y) 30 – (2 + 1)²+ 2³ = z) [ 4² + ( 5 – 3)³] : ( 9 – 7)³ =
Soluções para a tarefa
Resposta:
a)7 – ( 1 + 3) =
7-( 1+3)
7-4
3
b) 9 – ( 5 – 1 + 2) =
9-(4+2)
9-6
3
c)10 – ( 2 + 5 ) + 4 =
10- ( 2+ 5 ) + 4
10-7+4
7
d) ( 13 – 7 ) + 8 – 1 =
( 13-7)+ 8-1
6 + 8-1
14-1
13
e) 15 – ( 3 + 2) – 6 =
15- (3+ 2 )-6
15-5-6
10-6
4
f) ( 10 – 4 ) – ( 9 -8) + 3 =
(10-4)-(9-8)+3
6-1+3
5+3
8
g) 50 – [ 37 – ( 15 – 8 ) ] =
50-[37-(15-8) ]
50-22-8
28-8
20
h) 28 + [50 – (24 – 2) -10 ] =
28+[50-22-10]
28+18
46
i)20+[13+(10-6)+4} = 20+[13+4+4] = 20+21 = 41
j)52-{12+[15-(8-4)]} = 52-{12+[15-4]} = 42-{12+11} = 42-23 = 19
k)25+{12+[2-(8-6)+2]}= 25+{12+[2-2+2]} = 25+{12+2} = 25+14 = 39
l){[(18-3)+(7+5)-2]+5}-12 = {[15+12-2]+5}-12 = {25+5}-12 = 30-12 = 18
m)65-{30-[20-(10-1+6)+1]} = 65-{30-[20-15+1]]} = 65-{30-6} = 65-36 = 29
n)45+{15-[(10-8)+(7-4)-3]-4} = 45+{15-[2+3-3]-4} = 45+{11-2} = 45+9 = 54
o)40+{50-[35-(25+5)-1]}+7 = 40+{50-[35-39-1]} = 40+{50+5} = 40+55 = 95
p)
38 – { 20 – [ 22 – ( 5 + 3) + ( 7 – 4 +1)]} = 36
38 - { 20 - [ 22 - (8) + (7 - 3) ]} =
38 - { 20 - [ 22 - 8 + (4]} =
38 - { 20 - [ 14 + 4]} =
38 - { 20 - [18]} =
38 - { 20 - 18} =
38 - { 2} =
38 - 2 = 36
q)
26 + { 12 – [ ( 30 – 18) + ( 4 – 1) – 6 ] – 1 } = 28
26 + { 12 - [ (12) + (3) - 6 ] - 1 } =
26 + { 12 - [ 12 + 3 - 6 ] - 1 } =
26 + { 12 - [ 15 - 6] - 1 } =
26 + {12 - [ 9] - 1 } =
26 + { 12 - 9 - 1} =
26 + { 12 - 10} =
26 + { 2} =
26 + 2 = 28
r)
25-[10 + (7 - 4)] = 12
25 - [ 10 + (3) ] =
25 - [ 10 + 3] =
25 - [ 13] =
25 - 13 = 12
s)
32+ [10-(9-4)+8] = 45
32 + [ 10 - (5) + 8 ] =
32 + [ 10 - 5 + 8] =
32 + [ 5 + 8] =
32 + [ 13] =
32 + 13 = 45
t)
45 - [12 - 4+(2+1)] = 31??????????
45 - [ 12 - 4+ (3) ] =
45 - [ 12 - 4 + 3] =
45 -[ 8 + 3 ] =
45 - 11 = 34 ??????
u)
5² + 2³ - 2 x (3 + 9) = 9
25 + 8 - 2x(12) =
33 - 24 = 9
v)
6² : 3² + 4 x 10 – 12 = 32
36: 9 + 40 - 12 =
4 + 40 - 12 =
44 - 12 = 32
w)
(7² - 1 ) : 3 + 2 x 5 = 26
(49 - 1) : 3 + 10 =
(48) : 3 + 10 =
16 + 10 = 26
x)
4²- 10 + (2³ - 5) = 9
16 - 10 + (8 - 5) =
6 + (3) =
6 + 3 = 9
y)
30 – (2 + 1)²+ 2³ = 29
30 - (3)² + 8 =
30 - (9) + 8 =
30 - 9 + 8 =
30 - 1 = 29
z)
[ 4² + ( 5 – 3)³] : ( 9 – 7)³ = 3
[ 16 + (2)³ ] : (2)³ =
[ 16 + 8] : 8 =
[24] : 8 =
24 : 8 = 3
Resposta:a) 3. B) 5. C) 11. E d) 38
Explicação passo a passo: