3 x 12,8 = 38,4
0,1 x 38,4 = 3,84
38,4 - 3,84 = 34,56
3* 12,80zł=38,40zł-tyle kosztowalo 3 kg miesa
38,40zł*0,1=3,84-tyle wynosil rabat
38,40zł-3,84zł=34,56zł-tyle pani helena zaplacila z uwzglednieniem rabatu
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3 x 12,8 = 38,4
0,1 x 38,4 = 3,84
38,4 - 3,84 = 34,56
3* 12,80zł=38,40zł-tyle kosztowalo 3 kg miesa
38,40zł*0,1=3,84-tyle wynosil rabat
38,40zł-3,84zł=34,56zł-tyle pani helena zaplacila z uwzglednieniem rabatu