Odpowiedzi

2010-04-14T15:23:35+02:00
7½ : 1,8 + 2⅔ × (0,75 - ½ ) = 15/2 : 18/10 + 8/3 × (3/4 - 2/4)=
15/2 : 54/30 + 80/30 × 1/4 = 15/2 : 134/30 ×1/4 = 15/2 : 134/120 =
15/2 × 120/134 = 900/134 = 6 96/134 = 6 48/67
2010-04-14T15:30:49+02:00
7½: 1,8 +2⅔( 0,75- ½)= 15/2: 1⅘ + 2⅔( ¾-½)= 15/2 : 9/5 + 2⅔( ¾ - 2/4)= 15/2 * 5/9 + 2⅔ * ¼= 75/18 + 8/3 * ¼= 75/18 + ⅔= 75/18 + 12/18= 87/18= 4 15/18