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6th Grade AMP 23-241-Ratios
2-Ratios and Unit Rates
3-Proportions
4-Solving Proportions
5-Similar Figures
6-Maps and Scale Drawings
Chapter 5
TOPICS
TEAMMATES: ALEXA RODRIGUEZ LOERA, DENISSE BRUNER HERNΓNDEZ , DIEGO RIVAS HUERTA
A ratio is a comparison of two quantities. You can write a ratio in three different ways.
Ratios
The quantities in the ratio are called terms. The first term is a, and the second term is b.A ratio can compare a part to a whole, a part to another part of the whole, or the whole to a part.
RATIOS AND UNTIN RATES
A ratio is a comparison of two quantities.
When the denominator of a rate is 1, we call the rate a unit rate. We usually use the key word per or
the division symbol / to indicate a unit rate. For example:
If a student earns $8.50 per hour, it is the same as $8.50/hour, and means $8.50 for every 1 hour of
work.
the division symbol / to indicate a unit rate. For example:
If a student earns $8.50 per hour, it is the same as $8.50/hour, and means $8.50 for every 1 hour of
work.
Proportions
Proportions are statements that two ratios or fractions are equal. They express the relationship between different quantities or parts. For example, if you have a proportion like π/π = π/π, it means that the ratio of π to π is equal to the ratio of π to π.
For example:
40
48
24
48
not equal
equal
72
18
48
not equal
18
equal
Solving Proportions
To solve a proportion you can cross multiply for example, if you have the proportion π/π = π/π, you cross multiply ππ = ππ and then solve for the variable.
For example: