Question

ME AJUDEMMMMMM TENHO MAIS 7 ATIVIDADE PARA FAZER!!!

1) Calcule o valor das expressões:
a) 5 + ( -3) + 1
b) 10 + (-2) -4
c) 12 – 1 + (-4)
d) -1 + 3 – 9 =
e) 18 – (+7) + 3
f) 6 + (-1) - 2
g) (-2) - 7 – (-1)
h) (-5) - 1 + (-1)
i) 5 - ( -10) + 2
j) (-2) + (-3) - 25

2) Calcule o valor das expressões:
a) (-3) . (+7) + (-8) . (-3)
b) (-3) + (+2) - 7
c) 8 + (-3 -1)
d) (-2 + 6) : (+3 – 5)
e) –(-5) + (-7 + 4)
f) (-2) + (+5) . (-2)

3) Calcule o valor das expressões:
a) 5 – { +3 – [(+2) -(-5) + 6 – 4 ]}
b) 15 – { -3 + [(5 – 6) . (9 -8 ) + 1]}
c) 18 – { 6 – [ -3 – (5 – 4) – (7- 9) ] – 1 }
d) -2 + { -5 –[ -2 – (-2) - 3- (3 -2 ) ] + 5 }
e) 4 – {(-2) . (-3) – [ -11 + (-3) . (-4)] – (-1)}
f) ( 32 – 8 : 4) + ( 45 : 9 + 8) – 6

4) Calcule o valor das expressões numéricas:
a) 45 – { 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]}
b) 20 : 4 + 3 . 2 – 15 : 3
c) [ 25 – ( 18 : 3 )]. { 5 – [ 18 – ( 4 . 5 – 4 )]}
d) { 38 + [( 143 : 11 + 7 ) – 5 . 2]}: 6
e) 2 . [ ( 5 – 2 ) . ( 3 + 2 . 7 )] – 2
f) ( 8 + 6 . 8 : 4) + [ 3 + 15 : 5 + 5]
g) 25 : 5 + ( 8 + 3 . 10 : 2) + ( 4 . 3 – 14 : 7)
h) {[ 12 – 5 x 2 + ( 24 : 3 – 7) ] + 5}
i) ( 32 – 8 : 4) + ( 45 : 9 + 8) – 6

Answer 1

Explicação passo-a-passo:

1)

a) 5 - 3 + 1 = 2 + 1 = 3

b) 10 - 2 -4 = 10 - 6 = 4

c) 12 - 1 - 4 = 12 - 5= 7

d) -1 +3 - 9 = 3 - 10 = -7

e) 18 -7 +3 = 21 - 7= 14

f) 6 - 1 - 2 = 6 - 3= 3

g) -2- 7 + 1 = -9 +1= -8

h) -5 - 1 -1 = -7

i) 5 + 10 + 2 = 17

j) -2 -3 -25 = -30

2)

a)(-3) . (+7) + (-8) . (-3) = -21 + 24 = 3

b)(-3) + (+2) - 7 = -3 +2 -7 = -10+2 = -8

c) 8 + (-3 -1) = 8 - 4= 4

d) (-2 + 6) : (+3 – 5) = 4 : -2 = -2

e)–(-5) + (-7 + 4) = 5 + (-3) = 5 -3 = 2

f)(-2) + (+5) . (-2) = -2 + (-10)= -2 -10 = -12

3)

a) 5 – { +3 – [(+2) -(-5) + 6 – 4 ]} = 5 - { +3 -[+2 +5 +6 -4]} = 5 - { +3 -[13-4]} = 5-{3-[9]} = 5-[-6] = 5+6 = 11

b) 15 – { -3 + [(5 – 6) . (9 -8 ) + 1]} = 15 - {-3 +[(-1).1]} = 15- {-3+ [-1]} = 15-{-3-1} = 15 - {-4} = 15+4 = 19

c) 18 – { 6 – [ -3 – (5 – 4) – (7- 9) ] – 1 } = 18-{6-[-3-1-(-2)]-1} = 18-{6-[-4+2]-1} = 18-{6+2-1}= 18-7 = 11

d) -2 + { -5 –[ -2 – (-2) - 3- (3 -2 ) ] + 5 } = -2 + { -5 –[ -2 +2-3-1]+5} = -2 + { -5 -[-4]+5}= -2 + { -5 +4 +5} = -2+4 = 2

e) 4 – {(-2) . (-3) – [ -11 + (-3) . (-4)] – (-1)} = 4 – {+6 - [- 11+ 12] +1} = 4 – {+6 -1 +1} = 4-6 = -2

f) ( 32 – 8 : 4) + ( 45 : 9 + 8) – 6 =  ( 32 -2) + (5 + 8) – 6 = 30 + 13 -6 = 37

4)

a) 45 – { 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]}  = 45– { 4 . [(108 - 98) : (15 - 10)]} = 45– { 4 . [10 : 5]} = 45– { 4 .2} = 45 -8 = 37

b) 20 : 4 + 3 . 2 – 15 : 3  = 5 + 6 - 5 = 6

c) [ 25 – ( 18 : 3 )]. { 5 – [ 18 – ( 4 . 5 – 4 )]}  =  [ 25 –6 ]. { 5 –[ 18 - (20- 4)]}  = 19. { 5 –[ 18 - ( 16)]} = 19.{ 5 –2} = 19.3 = 57

d) { 38 + [( 143 : 11 + 7 ) – 5 . 2]}: 6  = { 38 + [( 13 +7) -10]} :6 = { 38 + [20 -10]} :6 = { 38 + 10} :6 = 48 :6 = 8

e) 2 . [ ( 5 – 2 ) . ( 3 + 2 . 7 )] - 2 = 2 . [ 3.(3 + 14)] -2 = 2 . [ 3. 17] -2 = 2. 51 -2= 102 -2 = 100

f) ( 8 + 6 . 8 : 4) + [ 3 + 15 : 5 + 5]  = ( 14. 2) + [3+3+5] = 28 + 11= 39

g) 25 : 5 + ( 8 + 3 . 10 : 2) + ( 4 . 3 – 14 : 7)  = 5 +(8+3.5) + (12 - 2) = 5+(8+15) +10 = 5 +23+ 10= 38

h) {[ 12 – 5 x 2 + ( 24 : 3 – 7) ] + 5}  = {[ 12 – 10 + ( 8 -7) ] + 5}  =  {[ 2 + 1] + 5}  = {3+5} = 8

i) ( 32 – 8 : 4) + ( 45 : 9 + 8) – 6 = ( 32 – 2) + (5+ 8) – 6 = 30 + 13 -6 = 43 - 6 = 37

Answer 2

Resposta:

a)  2 + 6 :  8 − 9  = g) d)  3 + 1.2 :  4.5 − 3=

 7   6 12   4 3 5   3 2 4

b) 3 + 4.1  : 3.2 + 1  = h) e) 1.2.12 + 3 : 3 + 1 : 4 =

8 2  3 4  3 5 8 8 3 3

c) 3.1 − 9  : 1.1 + 3− 1 =

 6 4  2 4