Question

Cine îmi face exerciții are 10 puncte

Answer 1

cu placere..............................,...,..

Answer 2

10 )

a)  { [ ( 7 × 3 - 5 ) + 2 × 6 ] : 4 + 5 } × 10 - [ ( 4 + 9 ) × 5 - 60 ] =

= { [ ( 21 - 5 ) + 12 ] : 4 + 5 } × 10 - ( 13 × 5 - 60 ) =

= [ ( 16 + 12 ) : 4 + 5 ] × 10 - ( 65 - 60 ) =

= ( 28 : 4 + 5 ) × 10 - 5 =

= ( 7 + 5 ) × 10 - 5 =

= 12 × 10 - 5 =

= 120 - 5 =

= 115

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b)

( 10¹⁰ - 10⁹ ) : ( 10⁹ - 10⁸ ) = 10

= 10⁹ x ( 10 - 1 ) : [ 10⁸ x ( 10 - 1 ) ] =

= ( 10⁹ x 9 ) : ( 10⁸ x 9 ) =

= 10 x ( 10⁸ x 9 ) : ( 10⁸ x 9 )

= 10 x  1 =

= 10

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c)

( 2²  x 2⁴ ) ² : 4⁶ - 16⁴ : 8⁵ : 2¹ : 2⁰ = 0

= ( 2⁶ )² : ( 2² )⁶ - ( 2⁴ )⁴ : ( 2³ )⁵ : 2 : 2⁰=

= 2¹² : 2 ²ˣ⁶  - 2 ⁴ ˣ ⁴  : 2 ³ ˣ⁵ : 2 : 2⁰ =

= 2 ⁽ ¹² ⁻ ¹² ⁾ - 2¹⁶ : 2¹⁵ : 2 : 2⁰ =

= 2⁰ - 2 ⁽ ¹⁶ ⁻ ¹⁵ ⁻ ¹ ⁻ ⁰ ⁾ =

= 1 - 2⁰ =

= 1 - 1 =

= 0

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d)

( 10 100 + 20 200 + ...... + 90 900 ) : ( 100 + 200 + ...... + 900 ) = 101

= 10 100 × ( 1 + 2 + 3 + ...... + 9 ) : [ 100 × ( 1 + 2 + ..... + 9 ) ] =

= ( 10 100 × 9 × 10 / 2 ) : ( 100 × 9 × 10 / 2 ) =

= 10 100 : 100 =

= 101