Ratio, Rates, Percents and Proportions

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In this video, Salman Khan of Khan Academy solves an advanced ratio problem.

In this video, Salman Khan of Khan Academy solves a ratio problem.

6th grade math knowledge map info

In this video, Salman Khan of Khan Academy solves another ratio problem.

In this video, Salman Khan of Khan Academy introduces you to ratios.

Gives a brief description of the simple interest formula with one complete example.

This site will help you convert from one measurement to another one. Lots of conversion to look at.

Simple explanation of Proportions

This is great to show a student how to calculate tip and sales tax to find the TOTAL bill

Though this site is for Chemistry it has good examples of scientific notation and significant figures.

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