Question

Помогите пожалуйста с решением

Answer 1

$\frac{7.2 - 6.1}{2.2} = \frac{1.1}{2.2} = \frac{1}{2} = 0.5$
$\frac{21}{17.5 \times 0.8} = \frac{21}{14} = \frac{3 \times 7}{2 \times 7} = \frac{3}{2} = 1.5$
$\frac{4}{25} + \frac{15}{4} = \frac{4 \times 4 + 15 \times 25}{25 \times 4} = \\ = \frac{16 + 375}{100} = \frac{391}{100} = 3.91$
$0.09 + 2 \frac{1}{4} = 0.09 + 2.25 = 2.34$