[tex] \tt2 \frac{1}{4} + 1 \frac{1}{2} - 0.6[/tex]
[tex] \tt = \frac{9}{4} + \frac{3}{2} - \frac{6}{10} [/tex]
[tex] \tt = \frac{9 \times 5}{4 \times 5} + \frac{3 \times 10}{2 \times 10} - \frac{6 \times 2}{10 \times 2} [/tex]
[tex] \tt = \frac{45}{20} + \frac{30}{20} - \frac{12}{20} [/tex]
[tex] \tt = \frac{63}{20} = 3 \frac{3}{20} [/tex]
#Cmiiw