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. =
$( frac{17}{8} - frac{11}{20} ) div frac{5}{46} = \ = frac{17 times 5 - 11 times 2}{40} times frac{46}{5} = \ = frac{85 - 22}{40} times frac{46}{5} = \ = frac{63}{40} times frac{46}{5} = frac{63 times 23}{20 times 5} = \ = frac{1449}{100} = 14.49$