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Posts tagged with algebra

Creative Mathematics teacher wins award

September22

How does the supply and demand for iPods help students make hypothetical business decisions both graphically and algebraically? And, what does bungy-jumping have to do with Barbie Doll calculations? Meredith Progar won a State-wide teaching award for engaging 9th and 10th-grade Algebra students at North Allegheny Intermediate High School, using such common, everyday illustrations and […]

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A common mistake in Algebra

August23

The following graphic from Wikihow shows a common mistake made by Jnr Math students: For more steps on understanding basic Algebra, click here.

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Talking about Math…let’s change the subject!

May11

So, you are at a friend’s party and they ask, “What did you do in the weekend?” You reply, “Well, I did a bit of Math and…” Whaaat?” they say, startled. “You did What???” “Mathematics!” “And what kind of Math did you do that made your weekend so exciting?” “Change the subject!” you say to […]

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The Distributive Law

October9

Growing Students of Mathematics need to understand some fundamental laws that are integral to the subject. Knowing how these laws work help with accuracy in solving problems. The Distributive Law is a key one to learn. Its use goes way back to the 1800s and it explains how we use parentheses ( ) in Algebra. […]

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Substituting – may the Algebraic Force be with you!

September16

This H3 ppt is free for download and distribution and is an introduction to the power of Algebraic Substitution – a critical skill for doing well in senior math. Here is the ppt: Substituting into an equation

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Algebraic Expressions and Main Operators

August29

A key knowledge of how Algebraic Expressions and Operators work is fundamental to improving grades in Middle School Mathematics – and really helpful for older students too! This free H3 Powerpoint explains the main definitions used in Algebra and also links to some interesting short videos. In addition (pun intended), the Powerpoint also has a […]

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You CAN learn Anything…

August20
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Substituting into an expression with accuracy

March18

It does sound easy, but many students lack accuracy when substituting values into an algebraic expression. H3 finds that there is greater success by using brackets when putting the values in. This will ensure that the signs are worked out correctly, using the BEMA rules! Here is an example: You can download the free ppt […]

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Mathematics Puzzles

November19

I don’t know about you, but solving puzzles is great mathematical fun, including the logic ones. This site by Maths is Fun┬áhas a range of great puzzles for you to try in your spare time!

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Getting Basic Algebra Skills with Dragon Box

November18

“This app is absolutely fantastic at teaching the fundamentals of algebra. I was surprised at how quickly my 7 year old progressed from avatar like dragons to negative numbers and pro numerals. Now to get my class onto this great app.”

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Post Support

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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