You may have a vague memory and understanding that numbers come in two forms: prime numbers and composite numbers. (Or at least prime and not prime.) Both of these terms have to do with a number's...

# Tag: multiply

Shortly after we start multiplying, we're taught to factor numbers. So often it feels like a pointless rite of passage that we're forced to endure. We learn it devoid of all the contexts it will be...

Few things will help a student keep up in math better than fluently and confidently knowing their multiplication tables. Teachers all over see this slowing students down in math class and undermining...

Arrays form the basis of one of the most versatile and powerful math tools in late elementary and early algebra. Arrays allow children and adults of all ages and stages to see insights and patterns....

The area model is a tool for organizing multiplication and division problems. The area model helps to ensure that each place value of one factor (one of the numbers being multiplied) is appropriately...

The area model is a powerful visual tool for organizing multi-digit multiplication. It is build on the premise that the area of a rectangle is the length of the rectangle times the width. Thus, when...