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b ) 2 6/11 : 7/11 : 3,4 = 4 :3,4 = 1 3/17
c ) 6 2/3 * (0,25 + 1/5 ) = 6 2/3 * 0,45 = 3
d ) 1 5/9 : 1 /13 * 0,75 = 14/15 * 3/4 = 7/10
e ) 3 1/3 - 1/3 * 0.6 = 1,8
f ) 3 4/9 - 1 2/3 * 1,8 = 1 7/9 * 1,8 = 3 1/3
g ) 4,5 * 5 5/9 + 6,4 * 3,8 = 25 + 24,32 = 49,32
Nie wiem czy wysztko dobrze : )