Answer:
[tex]1, 2, 3[/tex]
Step-by-step explanation:
[tex](2 \: x \: 1 \div 2) = (2 \div 2) = 1 \\ (4 \div 1x2) = (4 \: \div \: 2) = 2 \\ (6 \: x \: 1 \div 2) = (6 \div 2) = 3[/tex]