Strategies for subtracting mixed numbers with "regrouping"

Here are the 3 strategies you can use to subtract fractions when you need to "regroup".

Subtracting strategies

Subtracting Mixed Numbers using the common multiple strategy

Here is a video to remind you of the steps for subtracting fractions with unlike denominators by finding a common denominator using the common multiples strategy.

Subtracting Fractions with unlike Denominators

4.2 Subtraction-- the standard algorithm

Watch this video and be prepared to work on the problems with me. You will need a piece of paper and a pencil to complete this lesson. When you begin working on the lesson independently, use blocks or make a model to help you with your thinking.

4.2 Subtracting using the standard algorithm

Finding a Common Denominator using Multiples

Here is a quick video to review finding a common denominator, when adding fractions with unlike denominators, using the multiples strategy.

Lesson 10: finding common denominators using multiples