Hej!
I sposób
[tex]2 \frac{5}{6} \times 9 = \frac{17}{6} \times 9 = \frac{17 \times 3}{2} = \frac{51}{2} = 25 \frac{1}{2} [/tex]
II sposób :+
[tex]2 \frac{5}{6} \times 9 = (2 + \frac{5}{6} ) \times 9 = 2 \times 9 + \frac{5}{6} \times 9 = \\ \\ = 18 + \frac{45}{6} = 18 + 7 \frac{3}{6} = 18 + 7 \frac{1}{2} = 25 \frac{1}{2} [/tex]
Pozdrawiam! - Julka
Szczegółowe wyjaśnienie:
[tex]2 \frac{5}{6} \times \frac{9}{1} = \frac{17}{6} \times \frac{9}{1} = \frac{17}{2} \times \frac{3}{1} = \frac{51}{2} = 25 \frac{1}{2} [/tex]
[tex]2.8(3) \times 9 = 25.5[/tex]