Math problem that deals with the hands of a clock.
Tag Archives: math
One of the legends of math relates to the invention of the coordinate plane system. The legend states that Descartes was inspired to invent this system after watching a fly move around on the ceiling over his bed. This post tells the story and points out its relevance for modern math teachers.
How to tell if 8 divides into a number. There is a simple test for this. This post explains this.
Two factors limit the size of the GCF for any two numbers. Those factors are: 1) the difference between the two numbers, and 2) the size of the smaller of the two numbers. Whichever of these two factors is smaller is the Greatest Possible Greatest Common Factor, also known as the GPGCF.
Variables do not all serve the same purpose. Making this clear helps students more deeply understand algebraic equations, such as the equation for a line. This post shows how to understand the two kinds of variables in the slope-intercept form of a linear equation.
Quick easy trick for multiplying even numbers by 5.
Finding the domain and range of functions confuses many students. Using color to code the domain and range separately helps students distinguish domain and range, and thereby helps them find the domain and range for continuous functions.
Tricky area of algebra: negative signs in front of parentheses. This explains how we can help students relate the concept to everyday life, and thereby grasp it so they remember it!
Questions make math come alive. See an example that bursts open any sterotype that math is dull. See how math can be like a religious experience.
Adding color to help students understand algebra? Who would dream of it? But it works. See how color helps students understand a law of exponents in algebra.