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Chapter 7
vocabulary 7.1--7.4
7
Mathematics
7th Grade
01/05/2010

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Cards

Term
Ratio
Definition

A comparison of two numbers by division.

 

2 out of 3,

2 to 3

2:3

2

3

Term

Equivalent 

Ratio

Definition

Two ratios that have the same value

 

 

4                  36

9       and     81

 

Term
Rate
Definition
A ratio of two measurements having different units
Term
Unit  Rate
Definition
A rate with a denominator of 1
Term
Proportion
Definition

An equation that shows that two ratios are equivalent

 

a   =   c

 b        d 

 

Term
Cross  Product
Definition

Products of the terms on the diagonals when two ratios are compared.  If the cross products are edqual,l then theratios form a proportion

3   =    4

6         8

3X8            &              6X4

 

Term
Unit  Ratio
Definition
A unit rate where the denominator is one unit
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