[tex]3.(3) \times 0.6 = 3 \frac{3}{9} \times \frac{6}{10} \\ = \frac{3 \times 9 + 3}{9} \times \frac{6}{10} = \frac{30}{9} \times \frac{6}{10} = [/tex]
[tex] \frac{3}{9} \times 6 = \frac{18}{9} \div 9 = 2[/tex]
[tex]4.(6) \div 1.1(6) = \frac{46}{9} \div 1 \frac{1 6 - 1}{90} \\ = \frac{46}{9} \div \frac{1 \times 90 + 15}{90} [/tex]
[tex] \frac{46}{9} \div \frac{105}{ 90 } = \frac{46}{9} \times \frac{90}{105} \\ = \frac{46 \times 10}{1 \times 105} = \frac{460}{105} \div 5 = \frac{92}{21}[/tex]
[tex] = 4.38....[/tex]
[tex](3.(6) + 0.(3)) \times 0.25 = \\ (3 \frac{6}{9} + \frac{3}{9} ) \times \frac{25}{100} [/tex]
[tex] = ( \frac{33}{9} + \frac{3}{9} ) \times \frac{25}{100} = \\ \frac{36}{9} \times \frac{25}{100} = \frac{18 \times 25}{9 \times 50} = \frac{450}{450} = 1[/tex]
