Question

Помогите !) Решу ОГЭ !

Answer 1

5. =240/(32*2)=30/(4*2)=15/4=3.3/4=3,75
6. =2100/(6*28)=300/(6*4)=50/4=12.2/4=12,5
7. =
$( \frac{17}{8} - \frac{11}{20} ) \div \frac{5}{46} = \\ = \frac{17 \times 5 - 11 \times 2}{40} \times \frac{46}{5} = \\ = \frac{85 - 22}{40} \times \frac{46}{5} = \\ = \frac{63}{40} \times \frac{46}{5} = \frac{63 \times 23}{20 \times 5} = \\ = \frac{1449}{100} = 14.49$