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Ratios and Rates Review Sheet Test Date: _____________

How to prepare for a math test

• Read through this review sheet to determine what you know and what you don’t know. Focus your study time on what you don’t know first.

• Review vocabulary, reference sheets, notes, and key concepts

• Try problems from the practice packet in your binder. Remember, answers are on the back!

• Go to

Log in and use any of these resources:

Watch – a purple button that is a personal tutor for each concept

Check – the red check mark that is a quick quiz on a concept

Response to Intervention – RtI button has very basic explanations of

concepts with additional practice pages

Worksheets – a green button that has extra worksheets for concepts you

may want to practice more

• Ask for help! See Mrs. Blue during team support; ask a friend or a parent.

• Get a good night’s sleep and eat a good breakfast!

Key concepts

□ Factors & Multiples

o Find the GCF of two or more numbers

o Find the LCM of two or more numbers

o Know when to use GCF or LCM to solve word problems

▪ GCF if useful for finding the maximum # of groups

▪ LCM is useful for finding when two things will happen at the same time

□ Ratios

o What is a ratio?

o What three ways can you write a ratio?

o How is a ratio different than a fraction?

o When is a ratio in simplest form?

o Be able to put ratios into simplest form.

□ Rates

o What is a rate?

o How is a unit rate or unit price different from a rate?

o Calculate unit rates.

o Calculate unit prices.

o Why are labels so important on rates?

□ Ratio Tables

o Fill in ratio tables using equivalent ratios.

o What is scaling?

o When you scale up, what operation should you use?

o When you scale down, what operation should you use?

o How can you use scaling to get an equivalent ratio that does not have a whole

number by which you can multiply to get your answer? (Hint: Ex. 4 p. 41)

□ Graphing Ratio Tables

o Be able to plot ordered pair on a coordinate graph.

o Describe patterns you see in tables and graphs. Focus on the number patterns i.e.: $5 per hour for babysitting, $7 per movie ticket, 8:00 per mile on a long run.

o How does a faster rate of growth/increase show up on a graph when comparing two different rates?

□ Equivalent Ratios

o Calculate unit rates/prices for two different rates and determine if they are equal.

o Scale up or down to find a common denominator in two rates in order to compare them by their numerator.

□ Other

o Know conversions for:

▪ Feet to yards 3 ft = 1 yd

▪ Inches to feet 12 in = 1 ft

▪ Time 60 seconds = 1 min

▪ Days 7 days = 1 week

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