Step-by-step explanation:
A. Line up the decimals, then multiply as you would with whole numbers:
[tex]21.33 \\\times 2.04 \\ = 43.5132[/tex]
B. Line up the decimals, then add as you would with whole numbers:
Note: These decimals aren't lined up exactly.
[tex]1.115 \\ + 3.18 \\ = 4.295[/tex]
[tex]22.061 \\ + 4.295 \\ = 26.356[/tex]
[tex]26.356 \\ + 12.2384 \\ = 38.5944[/tex]
