Learn decimals with Khan Academy's interactive lessons, covering topics like place value, addition, subtraction, and more.

Review how the decimal number system works before diving into the binary number system. The decimal number system and binary number system work the same way; the only difference is what …

Decimal place value The first digit after the decimal represents the tenths place. The next digit after the decimal represents the hundredths place. The remaining digits continue to fill in the place values until …

Learn how to find the square root of a decimal number. The problem solved in this video is p^2 = 0.81.

And just like we reasoned through the last example, it does make a lot of sense, because to go from 8.25 to 825, you're moving the decimal over two spots. That's the same thing as multiplying by a …

8 goes into 1 no times, so we create a decimal point and go to the tenth's place. 8 goes into 10 (which is technically 1.0) one time, leaving a 2 (which is 0.2) remaining.

The first method involves converting the decimal into a fraction and multiplying the numerators and denominators together. The second method involves breaking the decimal into different place values …

To get the dividend to a whole number, you have to move the decimal point up. So, however many places to the left it was in your dividend, you will have it that many places left in your answer.

Sal is explaining where to put the decimal when you multiply them. This can be confusing so Sal breaks it down.

matches = difflib.get_close_matches(user_input, valid_words, n=1, cutoff=cutoff)