Question

Вычислите наиболее удобным способом:

Answer 1

$1) \: \frac{6.25 \times 3.6 - 6.25 \times 1.2}{1.2 \times 2.5} = \frac{6.25(3.6 - 1.2)}{1.2 \times 2.5} = 2.5 \times 2 = 5$
$2) \: \frac{ - 2.7 \times 0.42 \times ( - 0.84)}{0.6 \times ( - 0.21) \times 6.3} = \frac{3 \times 0.7 \times 4}{7} = 3 \times 0.1 \times 4 = 1.2$
$3) \: \frac{2.4 \times 0.08 + 4.8 \times 0.08}{ - 1.8 \times 0.04} = \frac{(2.4 + 4.8) \times 0.08}{ - 1.8 \times 0.04} = - 4 \times 2 = - 8$
$4) \: \frac{ (- \frac{1}{6}) \times (\frac{3}{7}) \times (- 1 \frac{1}{4}) }{ (- \frac{1}{7}) \times ( - 1 \frac{1}{2}) \times (\frac{5}{6}) } = - \frac{ - 3 \times (- 5) \times 2}{ - 3 \times ( - 5)} = 2$