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# Free video lessons for ratios and proportions (6th and 7th grade math/pre-algebra)

Find here free online math videos on ratios, proportions, and related topics: solving proportions, word problems, unit rates, proportional relationships, scaling geometric figures, and maps.

The videos match the lessons in the Blue Series book Math Mammoth Ratios, Proportions, and Problem Solving. As far as the complete curriculum (Light Blue), the lessons on ratios match chapter 4 of Math Mammoth Grade 6, and the rest match lessons in chapter 6 of Math Mammoth Grade 7 curriculum.

## Ratios

Unit rates

Word problems involving unit rates

Equivalent rates — using equivalent rates to solve problems, and also graphing them (2 videos)

Ratio problems and bar models

Aspect ratio

Using ratios to convert measurement units

## Proportions

Solving proportions

Proportion word problems

Unit rates and more about proportions

How to find the unit rate, including with fractions

Proportional relationships / Direct variation

Scaling figures and the scale ratio

Floor plans and scale ratio

How to calculate distances on the map or in reality using the map scale

These videos match the lessons in the book Math Mammoth Ratios, Proportions, and Problem Solving (Blue Series book), and the lessons in chapter 6 of Math Mammoth Grade 7 curriculum. In either of those, you will get MANY more practice exercises, word problems, and puzzles than what are shown in the videos, and also some lessons that are not in covered in this set of videos.

Math Mammoth Ratios, Proportions & Problem Solving worktext

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