Question

4,5*2/9+1 1/3:0.65=

(5 4/5+1,7)*(3 7/25-3,08)=

10 5/12-(3 1/6-1 2/3+375)=

Wyliczycie mi to? Prosze :)

Answer 1

4,5 = 4 i 1/2             0,65 = 65/100 = 13/20 

 

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4 i 1/2 + 1 i 1/3 : 13/20 = 4 i 1/2 + 4/3 * 20/13 = 4 i 1/2 + 2 i 2/39 = 4 i 39/78 + 2 i 4/78 = 6 i 43/78 

 

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1,7 = 1 i 7/10                      3,08 = 3 i 2/25 

 

 

( 5 i 4/5 + 1 i 7/10 ) * ( 3 i 7/25 - 3 i 2/25 ) = ( 5 i 8/10 + 1 i 7/10 ) * 5/25 =

 

= 9 i 15/10 * 1/5 = 10 i 1/2 * 1/5 = 21/2 * 1/5 = 21/10 = 2 i 1/10

 

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10 i 5/12 - ( 3 i 1/6 - 1 i 2/3 + 375 ) = 10 i 5/12 - ( 3 i 1/6 - 1 i 4/6 + 375 ) =

 

= 10 i 5/12 - ( 1 i 1/2 + 375 ) = 10 i 5/12 - 376 i 1/2 = 10 i 5/12 - 376 i 6/12 = -366 i 1/12