Question

dau coroana va rog frumos

Answer 1

0,6=6/10=3/5
1 si 1/9=10/9
(2-1/4)=8/4-1/4=7/4

a) 3/5 × 10/9-7/9 × 4/7=2/3-4/9=6/9-4/9=2/9

Answer 2

a)
$\frac{6}{10 } \times \frac{10}{9} - \frac{7}{9} \div ( \frac{8}{4} - \frac{1}{4} ) = \\ \frac{60}{90} - \frac{7}{9} \div \frac{7}{4} = \\ \frac{2}{3} - \frac{7}{9} \times \frac{4}{7} = \\ \frac{2}{3} - \frac{4}{9 } = \\ \frac{6}{9} - \frac{4}{9} = \frac{2}{9}$