Atividade Operações e Equações

EXERCÍCIOS EXTRAS SOBRE AS 4 OPERAÇÕES – PROF. RAFAEL

Nome: __________________________________________ Nº.____ Turma: _____

1) Arme e efetue as somas e subtrações:

a) 2154 + 125                     b) 125487 + 698

c) 45800 + 12548         d) 458 + 65487  

e) 5487 – 25                f) 254 – 49         

g) 12546 – 3898                 h) 6500 – 9878

2) Arme e resolva as seguintes adições e subtrações abaixo:

a) 46 – 23 =                 g) 54 + 45 =

b) 87 – 45 =                 h) 125 + 99 =

c) 125 – 98 =                 i) 1005 + 65 =

d) 5487 – 238 =                 j) 30056 + 256 =

e) 12005 – 312 =         k) 65478 + 32145 =

f) 3000 – 999 =                 l) 147200 + 15689 =

3) Arme e efetue as multiplicações:

a) 18 x 5        b) 132 x 8        c) 25 x 52        

d) 64 x 89            e) 125 x 45    f) 321 x 87        

4) Arme e efetue as divisões:

a) 20 : 5                 b) 49 : 7            c) 81 : 3

d) 85 : 5                e) 2154 : 2     f) 1400 : 4 g) 4888 : 8         h) 19644 : 3   i) 75 : 15

5) Calcule:

a) (–5) + (+2) – (–1) + (–7) =
b) (+2) – (–3) + (–5) – (–9) =
c) (–2) + (–1) – (–7) + (–4) =
d) (–5) + (–6) – (–2) + (–3) =
e) (+9) – (–2) + (–1) – (–3) =
f) 9 – (–7) –11 =
g) –2 + (–1) – 6 =
h) – (+7) – 4 – 12 =

6) Calcule o valor das expressões:

a) 20 : 2 – 7 =
b) – 8 + 12 : 3 =
c) 6 : (–2) +1 =
d) 8 : (–4) – (–7) =
e) (–15) : (–3) + 7 =
f) 40 – (–25) : (–5) =

7) Determine o valor de x:

a) 2x + 1 = 4x – 7

b) 9x + 9 + 3x = 15

c) 16x – 1 = 12x + 3

d) 3x – 2 = 4x + 9

e) 5x – 3 + x = 2x + 9

f) 17x – 7x = x + 18

g) x + x – 4 = 17 – 2x + 1

h) x + 2x + 3 – 5x = 4x – 9

8) Resolvas as seguintes equações do 2º grau:

a) (2x – 4)² = 0
b) (x – 3)² = –2x²
c)  3x² – 12 = 0?
d) x² + 3x – 28 = 0
e) 3x² – 4x + 2 = 0
f) x² – 3 = 4x + 2