Question

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Answer 1

Задание 2. Вычислите:

$\tt\displaystyle a)~55,2\cdot0,01=55,2\cdot\frac{1}{100} =\frac{55,2}{100}=0,552\\\\b)~89.7 \cdot1000=89700\\\\c)~6,13\cdot2,5=\frac{613}{100}\cdot\frac{25}{10}=\frac{613}{100}\cdot\frac{5}{2}=\frac{613}{20}\cdot\frac{1}{2}=\\\\\frac{613}{40}=15\frac{13}{40}=15,325\\\\d)~4,7:0,001=4,7:\frac{1}{1000} =4,7\cdot\frac{1000}{1}=4700\\\\e)~586,7:100=5,867$

$\tt\displaystyle f)~11,034:1,8=\frac{11034}{1000} :\frac{18}{10}=\frac{11034}{1000}\cdot\frac{10}{18}=\\\\=\frac{11034}{100}\cdot\frac{1}{18}=\frac{613}{100}\cdot\frac{1}{1}=6,13$