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Mathematics: Subtracting fractions


In this module, you can study how to add and subtract fractions with like denominators and also with unlike denominators.


The six-minute video above reviews the meaning of fractions and then explains fraction addition. (If you want to skip to the review, start the video at 2:30.)

The video above explains how to subtract fractions.

Did you know?

When you change a denominator (the bottom part) of a fraction, you must also change the numerator (the top part) to keep the fraction worth the same amount. 

Practice and study


The video explains how to use basic calculator functions and provides examples.


0.00 min      addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min      decimal point
2.43 min      C, CE and backspace
4.19 min      square, square root & fractions
6.17 min      percentage (%)

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