Ответ
Пояснения
.......................
Відповідь:
1) 8/15
2) 1/2
3) 2/15
Покрокове пояснення:
[tex]1) \frac{7}{36} + \frac{1}{5} + \frac{5}{36} = \frac{7}{36} + \frac{5}{36} + \frac{1}{5} = \frac{12 : 12}{36 : 12} + \frac{1}{5} = \frac{1 * 5}{3 * 5} + \frac{1 * 3}{5 * 3} = \frac{5}{15} + \frac{3}{15} = \frac{8}{15}[/tex]
[tex]2) (\frac{1}{6} + \frac{7}{15}) - \frac{2}{15} = \frac{1}{6} + \frac{7}{15} - \frac{2}{15} = \frac{1}{6} + \frac{5 : 5}{15 : 5} = \frac{1}{6} + \frac{1 * 2}{3 * 2} = \frac{1}{6} + \frac{2}{6} = \frac{3 : 3}{6 : 3} = \frac{1}{2}[/tex]
[tex]3) \frac{19}{42} - (\frac{5}{42} + \frac{1}{5}) = \frac{19}{42} - \frac{5}{42} - \frac{1}{5} = \frac{14 : 14}{42 : 14} - \frac{1}{5} = \frac{1 * 5}{3 * 5} - \frac{1 * 3}{5 * 3} = \frac{5}{15} - \frac{3}{15} = \frac{2}{15}[/tex]
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Answers & Comments
Ответ
Пояснения
.......................
Verified answer
Відповідь:
1) 8/15
2) 1/2
3) 2/15
Покрокове пояснення:
[tex]1) \frac{7}{36} + \frac{1}{5} + \frac{5}{36} = \frac{7}{36} + \frac{5}{36} + \frac{1}{5} = \frac{12 : 12}{36 : 12} + \frac{1}{5} = \frac{1 * 5}{3 * 5} + \frac{1 * 3}{5 * 3} = \frac{5}{15} + \frac{3}{15} = \frac{8}{15}[/tex]
[tex]2) (\frac{1}{6} + \frac{7}{15}) - \frac{2}{15} = \frac{1}{6} + \frac{7}{15} - \frac{2}{15} = \frac{1}{6} + \frac{5 : 5}{15 : 5} = \frac{1}{6} + \frac{1 * 2}{3 * 2} = \frac{1}{6} + \frac{2}{6} = \frac{3 : 3}{6 : 3} = \frac{1}{2}[/tex]
[tex]3) \frac{19}{42} - (\frac{5}{42} + \frac{1}{5}) = \frac{19}{42} - \frac{5}{42} - \frac{1}{5} = \frac{14 : 14}{42 : 14} - \frac{1}{5} = \frac{1 * 5}{3 * 5} - \frac{1 * 3}{5 * 3} = \frac{5}{15} - \frac{3}{15} = \frac{2}{15}[/tex]