McRuffy Math Blog
Mastery vs. Spiral Math: Which Approach Is Right for Your Child?
Mastery vs. spiral math is one of the biggest debates in homeschool curriculum. Here's what each approach means, the pros and cons of both, and how to decide what's right for your child.
Marvelous Multiplication #2
Learn an easy multiplication trick with 2 two-digit multipliers around an easy square by adding and subtracting the same number to and from the easy square. For example, the "easy square" of 20 (20 x 20 = 400), and multipliers of 20-2 and 20+2 (18 x 22)
Marvelous Multiplication #1
Use these techniques to do some Quick Math multiplying two-digit numbers that aren't squares.
Quick Math: Find the Squares of Numbers That End With 5
Want to teach your child some amazing math shortcuts? Follow our new blog series. The first blog features a math trick to quickly square numbers that end with 5.
Quick Math: Squaring Numbers 51 to 59
Learn this simple shortcut to square two-digit numbers with the digit 5 in the TENS place.