M105

Ratios Proportions

MathematicsGrade 12Grade 11Grade 10Grade 6Grade 7Grade 8Grade 9

Lyrics

Ratios Proportions

Ra-ra-ra ratio

Por –por –por proportion

Ra-ra-ra ratio

Por –por –por proportion

Ra-ra-ra ratio

Por – por – por proportion

I can show you all about a ratio proportion

A ratio is a comparison of things

For example take a group of people

Count up different things

Suppose there is 35 people 15 of whom are men

A ration 15 to 20 is what will get written in

Say the park is full of animals and 10 of them are dogs

The other 2 are elephants the ratio is small

If 10 of them are dogs and the other 2 are elephants

The ratio is 10 to 2 now you guys should be nailing it

Proportion is the name we give two ratios that’s equal

For example 20/25 is 4/5ths is its equal

Cross products is the method that we use to test proportion

Multiply extremes by the means equal numbers often are examples

5 and 20 equal the extremes

That means that 4 and 25 they must equal the means

You multiply em up the extremes and the means

See they both equal 100 so proportions what you see

Ra-ra-ra ratio

Por –por –por proportion

Ra-ra-ra ratio

Por –por –por proportion

Ra-ra-ra ratio

Por – por – por proportion

I can show you all about a ratio proportion

CCSS.MATH.CONTENT.7.RP.A.2.A — Decide whether two quantities are in a proportional relationship, e.g., by testing for equivalent ratios in a table or graphing on a coordinate plane and observing whether the graph is a straight line through the origin.
CCSS.MATH.CONTENT.6.RP.A.3.A — Make tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios.
CCSS.MATH.CONTENT.7.RP.A.3 — Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.
CCSS.MATH.CONTENT.6.RP.A.3 — Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.
CCSS.MATH.CONTENT.6.RP.A.3.D — Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.
CCSS.MATH.CONTENT.6.RP.A.1 — Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.