Question

1) resolva as expressões a) 5+(3-1) b) (13-4)-8 c) 12-(7-3) d) (20-3)+(7+5) e)5-[3+(2-5)] f) 3-[5-(4-6)] g) 2+[8-(7+5)+3] h) -8+[4-(7-13)-1]+5 i) 1-[5+(1-9)] j)-13-[10-(7+5)] k){5-[32(50-20)]} l){16-[12+(20-25)]} m)10-{30+[4-(5+2)]} n) -2-{5-[3-(-3-1)]} o) -[4+(3-8)-9]

Answer 1

a) 5+(3-1)

5+(2)

= 7

b) (13-4)-8

(9) - 8

= 1

c) 12-(7-3)

12 - (4)

= 8

d) (20-3)+(7+5)

(17) + (12)

= 29

e)5-[3+(2-5)]

5 - [3 + (-3)]

5 - 0

= 5

f) 3-[5-(4-6)]

3 - [5 - (-2)]

3 - [5 + 2]

3 - [7]

= -4

g) 2+[8-(7+5)+3]

2 + [8 - (12) + 3]

2 + [-1]

= 1

h) -8+[4-(7-13)-1]+5

-8 + [4 - (-6) - 1] + 5

-8 + [4 + 6 - 1] + 5

-8 + 9 + 5

= 6

i) 1-[5+(1-9)]

1 - [5 + (-8)]

1 - [5 - 8]

1 - [-13]

= 14

j)-13-[10-(7+5)]

-13 - [10 - (12)]

-13 - [-2]

= -11

k){5-[32(50-20)]}

{5 - [32 + 30]}

{5 - [62]}

= -57

l){16-[12+(20-25)]}

{16 - [12 + (-5)]}

{16 - [12 - 5]}

16 - 7

= 9

m)10-{30+[4-(5+2)]}

10 - {30 + [4- (7)]}

10 - {30 + [-3]}

10 - {27}

= -17

n) -2-{5-[3-(-3-1)]}

-2 - {5 - [3 - (-4)]}

-2 - {5 - [7]}

-2 - {-2}

= 0

o) -[4+(3-8)-9]

- [4 + (-5) - 9]

- 4 - 5 - 9

= -18