Adding/Subtracting Unlike Fractions

Section 3.6

Numerical and Algebraic

Notes

___________ fractions are fractions with different denominators.

Use the _________ of the denominators to rename the fractions before adding them.

Examples

Examples

Subtract Unlike Fractions

The rule for subtracting fractions with unlike denominators is similar to the rule for addition.

Example

H.O.T. Problem

Is the difference between a positive mixed number and a negative mixed number always, sometimes, or never positive? Justify your answer.

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H.O.T. Problem

Explain why you cannot add or subtract fractions with unlike denominators without renaming the fractions. You may use a diagram to illustrate your answer.

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