Once students learn about negative numbers and absolute value, the concept of greater and less becomes a bit “cloudy.” What was once clear is now “muddied.” But there is an easy way for students to tell which of two numbers is greater and which is less. That method involves looking at the numbers on the number line and using a memory trick derived from the spelling of the words “greater” and “less.” Enjoy!
Calculators can be great assistants when doing math. Unfortunately many students are unaware of the capability of many calculator keys. This is the first in an occasional series of posts that will help students learn how to make better use of the calculator.
There’s a nifty trick for finding out if 3 divides evenly into a number. This little proof shows why the trick works.
Practice problems for reducing fractions. Use divisibility tricks to reduce fractions.
There’s a weird and interesting trick for divisibility by 7. This blog tells you how to do it. Sit back and be amazed.
It is not hard to find out if 4 goes into a number evenly. Here is a trick that shows you how to find out very quickly.
Learning the divisibility tricks speeds up mental math. How to know if 3 divides into a number evenly? This blog tells you how
For any pair of numbers, how to find the GCF once you know the GPGCF.
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