Question

помогите дам сорок баллов​

Answer 1

1. $\frac{3}{8} \times ( - 4) + 5 = - \frac{3 \times 4}{8} + 5 = - 1.5 + 5 = 3.5$
2. $\frac{5}{9} \div ( - \frac{1}{3} ) - 7 = - \frac{5 \times 3}{9 \times 1} - 7 = - 1 \frac{2}{3} - 7 = - 8 \frac{2}{3}$
3. $\frac{2}{5} \times ( - 3) - \frac{4}{5} = - \frac{2 \times 3}{5} - \frac{4}{5} = - \frac{6}{5} - \frac{4}{5} = - \frac{10}{5} = - 2$
4. $\frac{5}{12} \div \frac{1}{4} - ( - \frac{1}{3} ) = \frac{5 \times 4}{12 \times 1} + \frac{1}{3} = \frac{5}{3} + \frac{1}{3} = \frac{6}{3} = 2$
5. $( \frac{1}{2} ) \times ( - 4) - 5 = - \frac{1 \times 4}{2} - 5 = - 2 - 5 = - 7$
6. $\frac{4}{9} \div ( - \frac{2}{3} ) + 1 = - \frac{4 \times 3}{9 \times 2} + 1 = - \frac{2}{3} + 1 = \frac{1}{3}$