Oblicz:
(8 1/5 – 10 3/10 )/(-7) + (- 4 1/2 ) ∙ 2/5 =

(5 1/4 ∶ 1,4 + 7 1/2 ∙ 4)/((36∶21/20- 75 3/14):3) =

[ 1+( 5/(3 )² (-3/5)⁻³ ( 2 1/3)⁵/(7/3)⁴ ]=

(4 2/5 ∶ 11 + 5⁻¹ - 3° + 3 2/5)/( 16∶ 4/7- 13 2/3):43) =

Oblicz 30% o warności wyrażenia :
5 1/2 - [1,2∙ 7/12 -( 0,8)/(-2)² ] : (-3)⁻¹ =

1

Odpowiedzi

2010-04-11T17:02:57+02:00
(8 1/5 – 10 3/10 )/(-7) + (- 4 1/2 ) ∙ 2/5 =
(8,2-10,3)/(-7)+(-4,5*0,4)=
-2,1:(-7)-1,8=0,3-1,8=-1,5

(5 1/4 ∶ 1,4 + 7 1/2 ∙ 4)/((36∶21/20- 75 3/14):3) =
(5,25:1,4+7,5*4)/((36*20/21-3/14):3)=
(3,75+30)/((34 2/7-3/14):3)=
33,75/((34 4/14-3/14):3)=
33,75/(34 1/14:3)=
(33 3/4)/(477/14*1/3)=
(135/4)/(159/14)=135/4:159/14=135/4*14/159=45/53

[ 1+( 5/(3 )² (-3/5)⁻³ ( 2 1/3)⁵/(7/3)⁴ ]=
[1+5/9*(-5/3)³*(7/3)⁵/(7/3)⁴]=
[1+5/9*25/9*7/3]=
[1+875/243]=[1+3 146/243]=4 146/243

(4 2/5 ∶ 11 + 5⁻¹ - 3° + 3 2/5)/( 16∶ 4/7- 13 2/3):43) =
(22/5*1/11+0,2-1+3,4)/((16*7/4-13 2/3):43)=
(0,4+0,2-1+3,4)/((28-13 2/3):43)=
3/14 1/3:43=
3/43/3*1/43=3:1/3=3*3=9

Oblicz 30% o warności wyrażenia :
5 1/2 - [1,2∙ 7/12 -( 0,8)/(-2)² ] : (-3)⁻¹ =
5,5-[12/10*7/12-(0,8)/4]:(-1/3)¹=
5,5-[0,7-0,2]:(-1/3)=
5,5-[-1/2*3]=5,5-[-1,5]=5,5+1,5=7

30%*7=0,3*7=2,1

Jak coś to pisz na pw. :)