Question

ПЛИЗ СРОЧНО ПОМОГИТЕ ОЧЕНЬ НАДО!!!! ДАЮ 20 БАЛЛОВ
Решите плиз заранее спасибо))​

Answer 1

Ответ:

Пошаговое объяснение:

1)пример

$1)\frac{5}{6} -\frac{21}{45} =\frac{75}{90} -\frac{42}{90} =\frac{33}{90}=\frac{11}{30} \\ \\ 2)\frac{11}{30}:1 \frac{5}{6} =\frac{11}{30}:\frac{11}{6}= \frac{11}{30}*\frac{6}{11} =\frac{1}{5} \\ \\ 3)1,125+1\frac{3}{4} =1,125+1,75=2,875\\ \\ 4)2,875-\frac{5}{12}=2\frac{875}{1000}- \frac{5}{12}=2\frac{7}{8} -\frac{5}{12}=2\frac{21}{24} -\frac{10}{24} =2\frac{11}{24} \\ \\ 5)2\frac{11}{24}:0,59=\frac{59}{24} :\frac{59}{100} =\frac{59}{24} *\frac{100}{59} =\frac{25}{6}$

$6)\frac{1}{5} *\frac{25}{6} =\frac{5}{6}$

$Otvet: \frac{5}{6}$

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2)пример

$1)\frac{5}{8} +2\frac{17}{24} =\frac{15}{24} +2\frac{17}{24} =2\frac{32}{24} =3\frac{1}{3} \\ \\ 2)3\frac{1}{3} :0,25=\frac{10}{3} :\frac{1}{4} =\frac{10}{3} *\frac{4}{1} =\frac{40}{3} \\ \\ 3)1,3+\frac{23}{30} =\frac{13}{10} +\frac{23}{30}=\frac{39}{30} +\frac{23}{30} =\frac{62}{30}=\frac{31}{15}=2\frac{1}{15} \\ \\ 4)2\frac{1}{15} +\frac{4}{11} =2\frac{11}{165} +\frac{60}{165} =2\frac{71}{165}$

$5)2\frac{71}{165} *\frac{110}{401} =\frac{401}{165} *\frac{110}{401} =\frac{2}{3} \\ \\ 6)\frac{2}{3} *0,5=\frac{2}{3} *\frac{1}{2} =\frac{1}{3} \\ \\ 7)\frac{40}{3} :\frac{1}{3} =\frac{40}{3} *\frac{3}{1} =40\\ \\ Otvet:40$