Learnzillion: Use Area Models to Add Unlike Mixed Number Fractions

Before Sal can divide a mixed number, he has to rewrite it as an improper fraction. He explains that dividing a fraction is the same as multiplying it by its reciprocal and that you can "cancel out" numbers to make multiplying easier.

Why can't mathematicians add just like they multiply fractions? The resource provides a counterexample to show that the same rules for multiplying fractions do not work for addition. Using the counterexample, learners see the proper way...

In this lesson, you will learn to solve word problems involving subtraction of unlike mixed number fractions by using area models. Login gives access to a slideshow and additional videos. [6:10]

In this lesson, you will learn to solve word problems involving subtraction of unlike mixed number fractions by using number lines. [5:49]

Expand the pupils knowledge of using area models to algebra. The interactive allows learners to use the same procedure of getting partial products when multiplying multi-digit numbers to multiplying polynomials. Scholars see how the...

Area works with decimals too. Pupils use the interactive to model multiplication of two decimals using an area model. They see how the decomposed components of the factors obtain partial products and then the complete product. Using area...

Explore two-digit multiplication with your class as they work in groups to build models of two-digit multiplication using base 10 manipulatives. They construct rectangles replacing standard numbers with equivalent place values using...

In this lesson, you will learn to model the subtraction of mixed number fractions with different denominators by using area models. [4:02]

Use multiplication with area models to understand how the standard algorithm for multiplication works.

All that matters is the tiles. Pupils use the interactive to investigate the relationship between area and perimeter using tiles. The interactive has an explore and a game mode to accommodate different steps in learning. The game mode...