Question

respomda rapipo porfavor ​

Answer 1

Resposta:

14)

a) (- 77) ÷ ( + 11) = - 7

b) (+20) ÷ (- 4) = - 5

c) (- 35) ÷ (+7) = - 5

d) (- 40) ÷ (- 5) = 8

e) (+ 51) ÷ (- 3) = - 17

f) (- 750) ÷ 10 = - 75

g) 500 ÷ (- 25) = - 20

15)

a)

${(- 11)}^{2} = \green{121}$

b)

${(+5)}^{3} = \green{125}$

c)

${(-7)}^{3} = \green{- 343}$

d)

${(- 3)}^{6} = \green{729}$

16)

a)

16 + [ 10 - (18÷3 + 2) + 5] =

16 + [ 10 - ( 6 + 2 ) + 5]

16 + [ 10 - 8 + 5]

16 + [2 + 5]

16 + 7

23

b)

25 - [ 12 - (3•2 + 1) ] =

25 - [ 12 - (6 + 1) ]

25 - [ - 7]

25 + 7

32

c)

90 - [ 25 + (5•2 - 1) + 3)]

90 - [ 25 + (10 - 1) + 3]

90 - [ 25 + 9 + 3]

90 - [ 34 + 3]

90 - [ 37]

90 - 37

53

d)

45 + [(8•5 - 10 ÷ 2) + (18 ÷ 6 - 2) ] =

45 + [ (40 - 5) +( 3 - 2) ]

45 + [ ( 35) + (1) ]

45 + [36]

81

e)

60 + 2•{[4•(6 + 2) - 10] + 12 } =

60 + 2•{[4•(8) - 10 ] + 12 }

60 +2•{[ 32 - 10] + 12}

60 + 2•{ 22 + 12}

60 + 2•{34}

60 + 68

128

Bons Estudos!