# Algebra Pinball

You can time yourself on a lot of my Algebra exercises. I remember watching my students at Miss Hall's School trying to beat a really fast time—their fingers were flying! It made me think of someone using a pinball machine, and thus was born ‘Algebra Pinball’.

Algebra Pinball is a collection of about 100 algebra and pre-algebra exercises (below) with an option to time yourself. Chart progress towards mastery by your increasingly faster times. Make it social with a fun family or classroom competition. Master these exercises and ace algebra!

These were the rules for the blazingly fast times (most from former students) that are shown below:

• Do at least 20 problems.
• The number correct must be at least 90% of the number attempted. (This prevents clicking through problems quickly to get to the easiest ones...)

Here is a sample of the information you get when you stop timing:

Don't be discouraged by the times listed in this chart! Most of these are extraordinarily fast times. I can't even come close!

## Algebra Pinball Exercise

(Click on ‘Skill Practice’ and then time yourself)

## Blazing Times

All times are seconds per correct problem

Expressions versus Sentences
• Skim the lesson.
• Click the question mark next to ‘Practice’ to watch a short video on how to use the exercises.
• Practice a bit, then time yourself! Have fun!
Sunny Lee
0.7 seconds
Jinghui Zhang
0.6 seconds
Woo Ji Kim
1.0 seconds
Hyun Sun Seo
1.8 seconds
Dr. Carol JVF Burns
2.2 seconds
(This one should be easier to beat!)
Masha Jones
1.4 seconds
Woo Ji Kim
1.1 seconds
Woo Ji Kim
1.1 seconds
Seon Ah Yoon
1.8 seconds
Sunny Lee
1.0 seconds
Soo Yeon Kim
1.4 seconds
Woo Ji Kim
1.4 seconds
Jinghui Zhang
1.4 seconds
Jinghui Zhang
1.4 seconds
Jinghui Zhang
1.6 seconds
Soo Yeon Kim
2.6 seconds
Soo Yeon Kim
1.2 seconds
Woo Ji Kim
1.2 seconds
Seon Ah Yoon
1.2 seconds
Jinghui Zhang
1.0 seconds
Jinghui Zhang
1.1 seconds
Jinghui Zhang
1.8 seconds
Hyun Sun Seo
2.2 seconds
Seon Ah Yoon
2.0 seconds
Woo Ji Kim
Ji Yune Kim
0.7 seconds
Woo Ji Kim
1.1 seconds
Seon Ah Yoon
1.0 seconds
Seon Ah Yoon
2.2 seconds
Hyun Sun Seo
0.7 seconds
Elaine Zhang
1.5 seconds
Hyun Sun Seo
0.7 seconds per
Woo Ji Kim
1.2 seconds
Seon Ah Yoon
2.2 seconds
Ji Yune Kim
0.8 seconds
Sally Melville
5.1 seconds
Ji Yune Kim
2.0 seconds
Dr. Carol JVF Burns
2.5 seconds
Dr. Carol JVF Burns
3.7 seconds
Kyung Eun Lee
0.9 seconds
Hyun Sun Seo
1.5 seconds
Woo Ji Kim
0.9 seconds
Woo Ji Kim
1.8 seconds
Woo Ji Kim
1.0 seconds
Seon Ah Yoon
1.7 seconds
Ji Yune Kim
0.8 seconds
Kyung Eun Lee
1.0 seconds
Soo Yoon Kim
2.3 seconds
Woo Ji Kim
1.0 seconds
Woo Ji Kim
1.0 seconds
Soo Yeon Kim
1.4 seconds
Hyun Sun Seo
1.8 seconds
Sei Young Shin
4.5 seconds
Woo Ji Kim
1.0 seconds
Hyun Sun Seo
2.6 seconds
Dr. Carol JVF Burns
11.7 seconds
(This one should be easier to beat!)
Soo Yeon Kim
1.4 seconds
Practice with $x^mx^n = x^{m+n}$
Woo Ji Kim
0.9 seconds
Practice with $(x^m)^n = x^{mn}$
Woo Ji Kim
1.0 seconds
Practice with $\displaystyle\frac{x^m}{x^n} = x^{m-n}$
Woo Ji Kim
1.1 seconds
Practice with $\displaystyle x^{-p} = \frac{1}{x^p}$
Soo Yeon Kim
0.8 seconds
Woo Ji Kim
1.1 seconds
Rurika Oka
2.1 seconds
Hyun Sun Seo
1.0 seconds
Seon Ah Yoon
2.8 seconds
Amelie Dyzmann
2.9 seconds
Hyun Sun Seo
1.0 seconds
Ji Yune Kim
1.1 seconds
Amelie Dyzmann
1.9 seconds
Dr. Carol JVF Burns
5.4 seconds
(This one should be easier to beat!)
Ji Yune Kim
0.9 seconds
Recognizing the Patterns $\,x^n\,$ and $\,(-x)^n\,$
Soo Yeon Kim
2.4 seconds
Writing Expressions in the Form $\,kx^n$
Soo Yeon Kim
1.5 seconds
Soo Yeon Kim
2.0 seconds
Sally Melville
5.4 seconds
Seon Ah Yoon
6.0 seconds
Kyung Eun Lee
4.7 seconds
Woo Ji Kim
3.3 seconds
Soo Yeon Kim
2.6 seconds
Woo Ji Kim
5.3 seconds
Simplifying $\,(a+b)^2\,$ and $\,(a - b)^2$
Woo Ji Kim
4.9 seconds
Woo Ji Kim
4.4 seconds
Kyung Eun Lee
1.2 seconds
Sally Melville
3.6 seconds
Hyun Sun Seo
2.0 seconds
Kyung Eun Lee
4.8 seconds
Seon Ah Yoon
3.7 seconds
Soo Yeon Kim
1.5 seconds
Hyun Sun Seo
3.4 seconds
Sei Young Shin
6.6 seconds
Hyun Sun Seo
2.1 seconds
Sally Melville
6.6 seconds
Dr. Carol JVF Burns
14.3 seconds
(This one should be easier to beat!)
Dr. Carol JVF Burns
15.2 seconds
(This one should be easier to beat!)
Woo Ji Kim
1.2 seconds
Suk Young Hong
0.9 seconds
Ji Yune Kim
0.8 seconds
Sei Young Shin
4.4 seconds
Factoring Trinomials of the Form $\,ax^2 + bx + c\,$