Important Vocabulary

• Cross multiply: multiplying the numerator of each fraction by the other's denominator
• Double Number Line: a diagram made of 2 number lines that helps students more easily “see” that there are many equivalent forms of the same ratio.
• Equivalent Ratios: Ratios that name the same comparisons.
• Multiplicative: having the power to multiply
• Proportion: A statement that two ratios are equal - two fractions that are equal, (e.g. 3/4 = 6/8)
• Ratio: A comparison of two numbers. Example: 3 : 4, 3/4, or 3 to 4.
• Scale Factor: a number which scales, or multiplies, some quantity
• Simplify: to rewrite an expression in a way that means the same thing but is simpler (or shorter)
• Tape Diagram: a visual model that uses a rectangle to represent the parts of a ratio.
• Value: a number that a variable or expression can equal

Activities at Home:

• Practice finding ratios and equal ratios by finding equivalent fractions.
• Create ratios for objects around the house. For example, the ratio of male shoes to female shoes.

Practice Writing Ratios

Practice Word Problems with Ratios

Practice Equivalent Ratios

Ratios: Just For Fun

Ratio Tables