Question

Ajutati-ma va rog dau coroana
D,E,F.​

Answer 1

d)

$( \frac{1}{4} - 0.25) \times 2018 = \\ = ( \frac{1}{4} - \frac{25}{100} ) \times 2018 \\ = ( \frac{1}{4} - \frac{1}{4} ) \times 2018 \\ = 0 \times 2018 \\ = 0$

e)

$13 \frac{2}{5} - 11.2 \div 9 \frac{1}{3} = \\ = \frac{13 \times 5 + 2}{5} - \frac{112}{10} \div \frac{9 \times 3 + 1}{3} \\ = \frac{67}{5} - \frac{112}{10} \div \frac{28}{3} \\ = \frac{67}{5} - \frac{112}{10} \times \frac{3}{28}$

$\frac{67}{5} - \frac{4 \times 3}{10} = \\ = \frac{134}{10} - \frac{12}{10} \\ = \frac{124}{10} \\ = 12.4$

f)

$\frac{3}{4} \div (0.8 - 0.65) = \\ = \frac{3}{4} \div 0.15 \\ = \frac{3}{4} \div \frac{15}{100} \\ = \frac{3}{4} \times \frac{100}{15} \\ = \frac{1}{1} \times \frac{25}{5} \\ = 5$