Question

найдите значение выражения 4 87/91*15/19*19/15 , 1 4/5*3,14*5/9, 0,75*1,4*1 1/3
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Answer 1

$4\frac{87}{91} * \frac{15}{19} * \frac{19}{15} = \frac{451}{91}$

$1\frac{4}{5} * 3,14 * \frac{5}{9} = 3,14$

$0,75 * 1,4 * 1\frac{1}{3} = 1,4$

Переводим смешанные дроби в неправильные:

1) $\frac{451}{91} * \frac{15}{19} * \frac{19}{15} = \frac{451}{91}$

1. $\frac{15}{19} * \frac{19}{15} = 1$

2. $\frac{451}{91} * 1 = \frac{451}{91}$

2) $1,8 * 3,14 * \frac{5}{9} = 3,14$

1. 1,8 * 3,14 = 5,652

2. $\frac{5652}{1000} * \frac{5}{9} = \frac{628}{200} = 3,14$

3) $\frac{3}{4} * \frac{14}{10} * \frac{4}{3} = 1,4$

1. $\frac{3}{4} * \frac{14}{10} = \frac{21}{20}$

2. $\frac{21}{20} * \frac{4}{3} = \frac{7}{5} = 1,4$