Question

Puteti va rog sa ma Ajutați-l
Ex 1-2-5-7
Va rog frumos

Answer 1

Răspuns:

Explicație pas cu pas:

1)  a)

- 17 + 23 + 15 - 33 + 12 = 0

= 6 - 18 + 12 =

= - 12 + 12 =

= 0

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b)

76 - 105 + 24 - 8 - 7 =

= - 29 + 24 - 15 =

= - 5 - 15 =

= - 20

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c)

- 211 + 101 + 110 - 25 = - 25

= - 211 + 211 - 25 =

= 0 - 25 =

= - 25

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d)

136 - 128 - 8 - 12 + 13 = 1

= 136 - 136 + 1 =

= 0 + 1 =

= 1

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2) a)  

- ( - 54 + 21 ) + ( - 19 + 21 ) - ( 54 + 17 ) + 2 = - 34

= - ( - 33 ) + ( + 2 ) - 71 + 2 =

= + 33 + 2 - 69 =

= 35 - 69 =

= - 34  

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b)

- ( - 7 + 15 - 67 ) + ( - 67 - 7 + 15 ) + 10 = 10

= - ( 8 - 67 ) + ( - 74 + 15 ) + 10 =

= - ( - 59 ) + ( - 59 ) + 10 =

= + 59 - 59 + 10 =

= 0 + 10 =

= 10

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c)

[ - 9 + 13 - ( - 9 + 13 - 10 ) ] - ( - 7 + 17 ) = 0

= [ 4 - ( 4 - 10 ) ] - ( + 10 ) =

= [ 4 - ( - 6 ) ] - 10 =

= ( 4 + 6 ) - 10 =

= 10 - 10 =

= 0

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d)

( - 11 + 37 - 42 ) + ( - 37 + 45 + 11 ) - 5 = - 2

= (  + 26 - 42 ) + ( 8 + 11 ) - 5 =

= - 16 + 19 - 5 =

= 3 - 5 =

= - 2

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5)

( - 4) × ( - 2 ) × ( - 10 ) : [ 120 : ( - 3) ] = 2

= - 80 : ( - 40 ) =

= + 2

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b)

[ - 9 × 4 × ( - 6) ] : [ ( - 1 ) × ( - 3 ) ] = 72

=[ - 36 × ( - 6) ] : ( + 3 ) =

= ( + 216) : 3 =

= 72

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c)

[ ( - 6) × 27 : ( - 9 ) ] : ( - 18 ) × 9 = - 9

= ( 6 × 3 ) : ( - 18 ) × 9 =

= 18 : ( - 18 ) × 9 =

= - 1 × 9 =

= - 9

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d)

[ ( - 6 ) × ( - 11 ) × ( - 1 ) ] : [ ( - 121 ) : 11 × 3 ] = 2

= ( - 66 ) : ( - 11 × 3 ) =

= ( - 66 ) : ( - 33 ) =

= 2

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7) a)

( -3)⁴ + 5²  - 2³ x 10 = 26

= + 81 + 25 - 8 x 10 =

= 106 - 80 =

= 26

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b)

[ ( -2)²]³ : ( - 8)² + [ ( - 2 ) x 5 ]² = 101

= 4³ : 64 + ( - 10)² =

= 64: 64 + 100 =

= 1 + 100 =

= 101

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c)

( - 2)² x 4² : ( - 2)⁶ - ( - 3)³ - 25 x 1¹⁰⁰ - ( - 5)² = - 21

= 4 x 16 : 32 - ( - 27 ) - 25 - 25 =

= 64 : 32 + 27 - 50 =

= 2 - 23 =

= - 21

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d)

[ ( - 27)³]⁴ : [ ( - 3)³ x ( - 9)⁵] : [ ( - 81)³]⁰ =

                     ( -3)³ x ( - 3)²ˣ⁵ = -3³⁺¹⁰

= + 27³ˣ⁴ :  (- 3¹³ ): 1 =

= -  3³ˣ¹² ⁻¹³ =

= - 3³⁶⁻¹³ =

= - 3²³