[tex]2.4 \times \frac{3}{8} = \frac{24}{10} \times \frac{3}{8} = \frac{12}{5} \times \frac{3}{8} = \frac{36}{40} = \frac{9}{10} [/tex]
[tex]2 \frac{3}{4} \div 2.75 = 2 \frac{3}{4} \div 2 \frac{3}{4} = 1[/tex]
[tex]2.5 \times 2 \frac{1}{2} = 2 \frac{1}{2} \times 2 \frac{1}{2} = \frac{5}{2} \times \frac{5}{2} = \frac{25}{4} = 6 \frac{1}{4} [/tex]
