Question

a) (3 x 2) × (5 - 1) + 4
b) 82-8x7: (4- 1 x 3)
c) 25 - [10 - (2 x 3 + 1)]
d) 70 - [12 + (5 x2 - 1) + 6]
e) 8:2+ [15-(4 x 2 + 1)]
f) 9 + [4 + 2 x (6 - 4) + (2 + 5)] - 8
g) 50 + {10 - 2 x [(6 + 4 : 2) - (10 - 3)]}
h)180 : { 10 + 2 x [20 – 45: (13 - 2x5)]}​

Answer 1

Resposta:

a)28

b)26

c)8

d)55

e)10

f)16

g)58

h)9

Explicação passo-a-passo:

a) (3 x 2) × (5 - 1) + 4

6x4+4

24+4

= 28

b) 82-8x7: (4- 1 x 3)

82-56:(4-3)

82-56:1

82-56

=26

c) 25 - [10 - (2 x 3 + 1)]

25- [10-(6+1)]

25- [10-7]

25-10-7

15-7

= 8

d) 70 - [12 + (5 x 2 - 1) + 6]

70-[12 + (10- 1) + 6]

70-[12 + 9 + 6]

70-[ 21+6]

70-21+6

49+6

=55

e) 8:2+ [15-(4 x 2 + 1)]

8:2+ [15-(8+ 1)]

8:2+ [15-9]

8:2+6

4+6

=10

f) 9 + [4 + 2 x (6 - 4) + (2 + 5)] - 8

9+[4 + 2 x 2 +7]-8

9+[4+4+7]-8

9+[8+7]-8

9+15-8

24-8

=16

g) 50 + {10 - 2 x [(6 + 4 : 2) - (10 - 3)]}

50+ {10 - 2 x [(6 + 2)-7]}

50+{10-2x [8-7]}

50+{10-2x 1}

50+{10-2}

50+8

= 58

h)180 : { 10 + 2 x [20 – 45: (13 - 2x5)]}​

180:{ 10 + 2 x [20 – 45: (13 - 10)]}​

180: { 10 + 2 x [20 – 45: 3]}​

180: { 10 + 2 x [20 – 15]}​

180: { 10 + 2 x 5}​

180: { 10+10}​

180:20

= 9