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Maria's Math news - a FREE math newsletter for parents and teachers
Latest from my blog
Various worksheets on TONS of math topics you can generate for free!
Basic operations worksheet generator is updated! Make worksheets for whole numbers or integers - all four operations, including add & subtract or multiply & divide - horizontal or vertical - add a border and/or extra workspace, use a variable, and more.
Advice, reviews, and resources to help you choose a math curriculum!
Online math games, tutorials, and activities
Games you can play online, interactive tutorials, fun math websites and more. Arranged by topic/level for ease of use.
Learn how to TEACH concepts or about general concerns in math education.
In-depth reviews of math products
Math help & tutoring
A list of free message boards, math help websites, and online tutoring services.
Fun and games
I have two games on my site, plus links to many.
Game: Choose Math Operation
Word guess game (easy hangman)
Word guess game (difficult)
Using the balance model with negative terms in an equation
It is not so easy to portray negatives in an equation with the balance model because in the natural we don't have any 'negative weight', but you can think of the negatives as holes or empty spots that when filled with positives, they become nothing or zero.
The same thing can happen with the blocks or x's - they can be negative too! Try the following example:
Checking the solution: we substitute x = -4 to the equation 2x + 3 = -5:
2(-4) + 3 = -5
-8 + 3 = -5
-5 = -5
So it was the right solution.
More exercises - you can solve these equations with the help of the balance model or just with pencil and paper
A Balanced Equation Model from Absorb Mathematics