1.2+3-3\2= Dibaca Satu koma dua ditambah tiga dikurang tiga perdua

[tex]1.2 +3 - \frac{3}{2} \\ = \frac{12}{10} + \frac{3}{1} - \frac{3}{2} \\ = \frac{12 + 10 \times 3 - 5 \times 3}{10} \\ = \frac{12 + 30 - 15}{10} \\ = \frac{27}{10} \\ = 2.7[/tex]

Maaf Kalau Salah

1,2+3-3/2 = 12/10+6/2-3/2
                =12/10+3/2
                = 12/10+15/10
                =27/10
                = 2,7 = 2 7/10