Put the rational numbers in order from smallest to largest.

3½ 0.5 - ¾ -4 ¼ 8/10 -4.3

rational numbers+

convert all to decimal, then it's easy

3 1/2 = 3.50
-3/4 = -0.75
and so on

To order the rational numbers from smallest to largest, we need to compare their values. A rational number is a number that can be expressed as a fraction of two integers, where the denominator is not zero.

Let's break down each given rational number:
1. 3½ can be written as the fraction 7/2, which is equal to 3.5.
2. 0.5 is already in decimal form.
3. -¾ can be written as the fraction -3/4.
4. -4¼ can be written as the fraction -17/4, which is equal to -4.25 in decimal form.
5. 8/10 can be simplified to 4/5, which is equal to 0.8 in decimal form.
6. -4.3 remains as it is.

Now, let's put these rational numbers in order from smallest to largest:

-4.3 < -4.25 < -3/4 < 0.5 < 0.8 < 3.5

Therefore, the rational numbers in order from smallest to largest are:

-4.3, -4.25, -3/4, 0.5, 0.8, 3.5.