Question

Помогите 510 5-6 511 4-6 513 2-4
Пожалуйста мне надо срочно
Не сложно

Answer 1

510.

5) $(\frac{7}{18} - \frac{1}{12}) +\frac{5}{6}  = (\frac{14}{36} - \frac{3}{36}) +\frac{5}{6}  = \frac{11}{36} +\frac{5}{6}  = \frac{11}{36} +\frac{30}{36}  =\frac{41}{36} = 1 \frac{5}{36}$

6) $(\frac{3}{4} - \frac{8}{15}) +\frac{17}{20}  = (\frac{45}{60} - \frac{32}{60}) +\frac{17}{20}  =  \frac{13}{60} +\frac{17}{20}  = \frac{13}{60} +\frac{51}{60}   =\frac{64}{60} = 1 \frac{4}{60} = 1 \frac{1}{15}$

511.

4) $\frac{1}{*} +\frac{1}{8} =\frac{*+*}{24}$

$24/8=3$

$\frac{1}{3} +\frac{1}{8} =\frac{*+*}{24}$

$\frac{8}{24} +\frac{3}{24} =\frac{*+*}{24}$

$\frac{*+*}{24} = \frac{8}{24} +\frac{3}{24} = \frac{8+3}{24} = \frac{11}{24}$

5) $\frac{1}{3} +\frac{1}{*} =\frac{*+*}{6}$

$6/3 = 2$

$\frac{1}{3} +\frac{1}{2} =\frac{*+*}{6}$

$\frac{2}{6} +\frac{3}{6} =\frac{*+*}{6}$

$\frac{*+*}{6} = \frac{2}{6} +\frac{3}{6} = \frac{2+3}{6} = \frac{5}{6}$

6) $\frac{1}{*} +\frac{1}{7} =\frac{*+*}{42}$

$42/7 = 6$

$\frac{1}{6} +\frac{1}{7} =\frac{*+*}{42}$

$\frac{7}{42} +\frac{6}{42} =\frac{*+*}{42}$

$\frac{*+*}{42} = \frac{7}{42} +\frac{6}{42} =\frac{7+6}{42} = \frac{13}{42}$

513.

2) $(\frac{2}{35} + \frac{3}{28}) + \frac{1}{28} = \frac{2}{35} + (\frac{3}{28} + \frac{1}{28}) = \frac{2}{35} + \frac{4}{28}) = \frac{2}{35} + \frac{1}{7}) = \frac{2}{35} + \frac{5}{35}) = \frac{7}{35} = \frac{1}{5}$

3) $(\frac{7}{30} + \frac{8}{45}) + (\frac{2}{45} + \frac{1}{30}) = (\frac{7}{30} + \frac{1}{30}) + (\frac{2}{45} + \frac{8}{45}) = \frac{8}{30} + \frac{10}{45} = \frac{4}{15} + \frac{10}{45} = \frac{12}{45} + \frac{10}{45} = \frac{22}{45}$

4) $(\frac{5}{24} + \frac{11}{60}) + (\frac{13}{60} + \frac{1}{24}) = (\frac{11}{60}+ \frac{13}{60}) + (\frac{5}{24} + \frac{1}{24}) = \frac{24}{60} + \frac{6}{24} = \frac{2}{5} + \frac{1}{4} =\frac{8}{20} + \frac{5}{20} = \frac{13}{20}$