Question

Cine ma ajuta la mate.dau 20 de puncte.b) 3 supra 4 minus 3 supra 4 ori 1 supra 2 c) 4 supra 3 ori 2 supra 6 +2 supra 4 ori 2 d) -2 supra 3 ori (6 supra 4 -5 supra 9) e) (-1 supra 2)ori(-2 supra 3)ori[6 supra 9+(-5 supra 8)]+3 supra 6 f) 4 supra 2 ori 5 supra 3 ori 0 ori 6 supra 7 +5 supra 2 g) 2 supra 4 ori[-8 supra 4 ori(-3 supra 8 - 5 supra 9)]- 3 supra 8

Answer 1

b)  3 / 4  - 3 / 4 × 1 / 2 = 6 / 8 - 3 / 8 = 3 / 8

c)  ( 4 / 3 ) × ( 2 / 6 ) + 2 / 4 × 2 =  8 / 18 + 4 / 4 = 4 / 9 + 1 = ( 4 + 9 ) / 9 = 13 / 9

d)    ( - 2 / 3 ) ×  (  6 / 4 - 5 / 9 ) =  ( - 2 / 3 ) × ( 54  - 20 ) /  36 =

=  ( - 2 / 3 ) x ( -  34 / 36)  =  17 / 27

e)  ( - 1 / 2 )  ×  ( - 2 / 3 ) × [ 6 / 9 + ( - 5 / 8 ) ] + 3 / 6 =

= 1 / 3 × ( 2/ 3 - 5 / 8 ) + 1 / 2 =

= 1 / 3 × (  16/ 24 - 15 / 24 ) + 1 / 2 =

= 1 / 3 × ( 1  / 24 ) + 1 / 2 =

=  1 / 72 + 36 / 72 =

= 37 / 72

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f)   4 / 2 × 5 / 3 × 0 × 6 / 7 + 5 / 2 =  0 + 5 / 2 = 5 / 2

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g)   2 / 4 × [ - 8 / 4 × ( - 3 / 8 - 5 / 9 ) ] - 3 / 8 =

= 1  / 2 × [ - 2 × ( - 27 / 72 - 40 / 72 ) ] - 3 / 8 =

= 1 / 2 × [ - 2 × ( - 67 / 72 ) ] - 3 / 8 =

= 1 / 2 × 67 / 36  - 3 / 8 =

= 67 / 72 - 27 / 72 =

= 40 / 72 =

= 5 / 9