Question

a) 1 x (1 + 7) - 16:(1+3) =
b) 7 x (9 + 5) - 12 : (4 + 2) =
c) 2 x (7 + 1) - 32 : (7 + 9) =
d) 9 x (3 + 7) - 30 : (9 + 6) =
e) 4 x (6 + 1) - 10 : (1 + 9) =
f) 2 x (4 + 6) - 27 : (3 + 6) =
g) 9 x (1 + 3) - 15: (9 + 6) =
h) 3 x (6 + 3) - 10 : (2 + 8) =
i) 7 x (8 + 3) - 30 : (9 + 6) =​

Answer 1

Explicação passo-a-passo:

A) 1 x (1 + 7) - 16:(1+3) =

1 × 8 - 16 : 4

8 - 16 : 4

8 - 4

= 4

B) 7 x (9 + 5) - 12 : (4 + 2) =

7 × 14 - 12 : 6

98 - 12 : 6

98 - 2

=96

C) 2 x (7 + 1) - 32 : (7 + 9) =

2 × 8 - 32 : 16

16 - 32 : 16

16 - 2

=14

D) 9 x (3 + 7) - 30 : (9 + 6) =

9 × 10 - 30 : 15

90 - 30 : 15

90 - 2

=88

E) 4 x (6 + 1) - 10 : (1 + 9) =

4 × 7 - 10 : 10

28 - 10 : 10

28 - 1

= 27

F) 2 x (4 + 6) - 27 : (3 + 6) =

2 × 10 - 27 : 9

20 - 27 : 9

20 - 3

= 17

G) 9 x (1 + 3) - 15: (9 + 6) =

9 × 4 - 15 : 15

36 - 15 : 15

36 - 1

=35

H) 3 × (6 + 3) - 10 : (2 + 8) =

3 × 9 - 10 : 10

27 - 10 : 10

27 - 1

=26

I) 7 x (8 + 3) - 30 : (9 + 6) =

7 × 11 - 30 : 15

77 - 30 : 15

77 - 2

38 38

×2

76

+ 1 <- que sobrou

= 77