How to Use Division Properties

Division, like other mathematical operations, has several properties. Understanding these properties can help you manipulate expressions and solve problems more effectively.

How to Use Division Properties

A Step-by-step Guide to Using Division Properties

Here is a step-by-step guide on how to use some of the most important division properties:

Step 1: Division by Zero

Division by zero is undefined. This means that you cannot divide any number by zero. For instance, “5 divided by 0” is not a valid mathematical operation.

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Step 2: Zero Divided by Any Number

Zero divided by any nonzero number is zero. For instance, “0 divided by 5” is 0.

Step 3: Division of Positive and Negative Numbers

  • If you divide two positive numbers or two negative numbers, the result is positive.
  • If you divide a positive number by a negative number, or vice versa, the result is negative.

Step 4: Division is the Inverse Operation of Multiplication

If \(a=b \times c\), then \(b=\frac{a}{c}\) and \(c=\frac{a}{b}\). For instance, if \(6=2 \times 3\), then \(2=\frac{6}{3}\) and \(3=\frac{6}{2}\).

Step 5: Dividing by 1 and -1

  • Any number divided by 1 is the number itself.
  • Any number divided by \(-1\) is the negative of that number.

Step 6: Division of Fractions

When dividing fractions, you multiply the first fraction by the reciprocal of the second fraction. The reciprocal of a fraction is obtained by switching the numerator and the denominator. For example, when dividing \(\frac{2}{3}\) by \(\frac{1}{2}\), you multiply \(\frac{2}{3}\) by \(\frac{2}{1}\) (the reciprocal of \(\frac{1}{2}\)) to get \(\frac{4}{3}\).

Step 7: Distribution Over Addition and Subtraction

Division does not distribute over addition or subtraction. This means that \(\frac{a+b}{c}\) is not equal to \(\frac{a}{c}+ \frac{b}{c}\), and \(\frac{a-b}{c}\) is not equal to \(\frac{a}{c}-\frac{b}{c}\).

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Step 8: The Quotient Remainder Theorem

For any integers \(a\) and \(b\), with \(b > 0\), there exist unique integers \(q\) and \(r\) such that \(a = bq + r\) and \(0 ≤ r < b\). Here, \(q\)is the quotient and \(r\) is the remainder when \(a\) is divided by \(b\).

Step 9: Long Division

  • This is a method of dividing large numbers. The steps are as follows:
  • Divide: How many times does the divisor fit into the first part of the dividend?
  • Multiply: Multiply the divisor by the result from step 1.
  • Subtract: Subtract the result from step 2 from the first part of the dividend.
  • Bring down: Bring down the next part of the dividend and repeat the steps until you have gone through the entire dividend.
  • The final result is the quotient with any remainder.

These are some of the basic division properties and how to use them. Understanding these properties can make it easier to perform more complex mathematical operations.

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