Division - How do you do long division?
Quatr.us answers questions


three balls in each of three boxes

Division is a way of answering the question: how many of these things can I fit into that box? If you divide nine by three, that's the same as asking this question: if I have a box that will fit nine things, how many groups of three things will fit in the box?

How to do long division

Division is the same thing as multiplication, really, except you are multiplying by a fraction. Dividing 4 in half to get 2 is the same thing as multiplying 4 x 1/2 = 2.

To do long division, you need to fit one number (the divisor) into the digits of the other number (the dividend) to slowly build the answer (the quotient). This video explains one way to write down what you're doing so you don't lose track, but you can write it down any way that works for you.

Learn by doing - Commutation and the Number Line
More about subtraction

Bibliography and further reading about addition:

More about Multiplication
More about Fractions
More about Math
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Professor Carr

Karen Eva Carr, PhD.
Assoc. Professor Emerita, History
Portland State University

Professor Carr holds a B.A. with high honors from Cornell University in classics and archaeology, and her M.A. and PhD. from the University of Michigan in Classical Art and Archaeology. She has excavated in Scotland, Cyprus, Greece, Israel, and Tunisia, and she has been teaching history to university students for a very long time.

Professor Carr's PSU page

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Happy New Year! Welcome back! Get ready for Martin Luther King day with these articles about medieval Africa, slavery, the Civil War, emancipation, the civil rights movement, and Martin Luther King Jr. himself. More about King here...