Question

ATIVIDADES PARA OS 1º ANOS
Considerando as regras para resolução das
expressões numéricas, calcule.
a) (4 +6 x 6) – 5 x8 =
b) (12 + 30 : 6) =
c) 38+ (66 - 6 x 9) =
d) 35 x (7- 5) =
e) 52 – (25 + 78 : 13) =
f) (25 – 5 x 4) : 5 =
g) 35 + (13 x 8 – 4) =
h) (12 + 2 x 5) – 8 =
i) 25 – (15 + 6 : 3) x 5 – 10 =
j) 45 : (3 x 2 + 9) =
k) 4 x (32 : 8 + 6) + 100 – (3 x 20 + 3) =
l) 5 x (8 + 12 -6) : 7 =

Answer 1

Resposta:

Explicação passo-a-passo:

a) (4 +6 x 6) – 5 x8 =

= (4+36) - 40

= 40-40

= 0

__________

b) (12 + 30 : 6) =

= 12+5

= 17

________

c) 38+ (66 - 6 x 9) =

= 38 + (66 - 54)

= 38 + 12

= 50

________

d) 35 x (7- 5) =

= 35 . 2

= 70

__________

e) 52 – (25 + 78 : 13) =

= 52 - (25 + 6)

= 52 - (31)

= 52 - 31

= 21

________

f) (25 – 5 x 4) : 5 =

= (25 - 20) : 5

= 5:5

= 1

________

g) 35 + (13 x 8 – 4) =

= 35+ (104-4)

= 35 + 100

= 135

_______

h) (12 + 2 x 5) – 8 =

= (12+10) - 8

= 22 - 8

= 14

______

i) 25 – (15 + 6 : 3) x 5 – 10 =

= 25 - (15+2).5 - 10

= 25 - (17).5 - 10

= 25 - 85 - 10

= 25 - 95

= - 70

_______

j) 45 : (3 x 2 + 9) =

= 45 : (6+9)

= 45 : 15

= 3

_______

k) 4 x (32 : 8+6)+100 – (3 x 20 + 3) = 4.(4+6)+100 - (60+3)

= 4.10 + 100 - (63)

= 40 + 100 - 63

= 140 - 63

= 77

_______

l) 5 x (8 + 12 -6) : 7

= 5 . (20-6):7

= 5 . 14:7

= 5.2

= 10