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2/3*0,2l=2/15 l <---tyle w 1 szklance
9 szklanek
9*2/15 l=18/15 l=1 i 3/15 l=1,2 l
²/₃× 1,8=1,2
do szklanek rozlano 1,2l soku
²/₁₅ * 9 =¹⁸/₁₅=1³/₁₅=1⅕=1,2[l]
Odp. Do szklanek rozlano 1.2 litra soku.