Question

Oblicz :

9 7/12 - 7 4/15 + 2 3/4 - 1 11/20 =

( 4 2/15 + 5 13/20 ) - ( 2 19/24 - 1 1/5) =

Proszę ze wszystkimi obliczeniami. /- kreska ułamkowa

Answer 1

7/12 = 35/60 

4/15= 16/60

3/4=  45/60

11/20=  33/60

 

 9 7/12 - 7 4/15 + 2 3/4 - 1 11/20 = 9 35/60 + 7 16/60 + 2 45/60 + 1 33/60= 19 129/60 = 21 9/60= 21 3/20

 

 2/15= 8/60

13/20=  39 /60 

 

 19/24=  95 /120

1/5= 25/120

 

 47/60 = 94/120

 

 ( 4 2/15 + 5 13/20 ) - ( 2 19/24 - 1 1/5) = ( 4  8/60 + 5  39 /60) - (2 95/120 - 1 26/120) = 9 47/60 - 1 69/120 = 9 94/120 - 1 69/120 = 8 25/120= 8 5/24