18.2 18.45 18.6 18.76
i needed to order them smallest to largest did i do it right?

Since they all use the same whole number (18), you must compare the tenths and hundredths places (the two places after the decimal point). There, you would just order them like normal numbers, smallest to largest.

In short, yes, you did do it right! Hope this helps!

223000g
2230000cg