In adding and subtracting fractions with unlike denominators, you have to get a least common denominator which is exactly like the least common multiple it just so happens to be in the denominator.

Here is the new description with all links and additional text removed: Learn how to add and subtract fractions whose denominators are not the same. Recall that when we want to add or subtract ...

Each fraction has the same denominator. Use the numerators to order the fractions. The smaller the numerator, the smaller the fraction. The numerators are all the same. Use the denominators to order ...

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When adding or subtracting fractions, you need to look at the denominator. If the denominator is the same, then you can just add or subtract the numerator. If the denominator is different, then you ...

DreamBox Learning has recently extended its web-based K-3 math teaching tool, DreamBox Learning Math, with additional lessons and an intermediate learning platform for students in grades 3-5. DreamBox ...