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Math 6E - Unit
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Estimation 180 Questions
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Estimation 180 Questions
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Introduction to Ratios
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Definition of Ratio: Shows the relative size of two or more values
Ratios can be represented in three ways:• Part to Part stars to circles 3:4• Part to Whole stars to shapes 3:7• Whole to Part shapes to circles 7:4
Part- describes a portion or part of the pictureWhole - describes the whole picture
Ratios can be written in three ways:
1) Using a colon Example 3 : 4, 3 : 7, 7 : 4
2) Using the word “to”Example 3 to 4, 3 to 7, 7 to 4
3) As a fraction (only part to whole ratios can be written like this) Example: 3/7
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Practice with Equivalent Ratios
Reduce the following ratios:1) 2:4
2) 6:9
3) 5:15
4) 12:20
5) 18:45
6) 21:49
7) 30:72
8) 39:52
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• Ratio – A ratio is a comparison between two or more quantities that are related.
• Ratios can be equivalent to each other in the same way that fractions can be.
• Example• Girls to Boys 3:2
Is equivalent to the ratio of girls to boys 6: 4
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Which car has the best gas mileage?
Camry 392 mi, 14 gal
Hummer 176 mi, 11 gal
Accord 312 mi, 12 gal
Prius 400 mi, 8 gal
Mustang 368 mi, 16 gal
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• Rates and Ratios Venn Diagram• Handout given in class (extras can be found in blue crate
on counter marked “6E”)
• Or you can navigate to the link below and print a copy at home.
• http://www.graniteschools.org/depart/teachinglearning/curriculuminstruction/math/elementarymathematics/K6%20Support%20Documents/6th%20Grade%20Support/Rates%20and%20Ratios%20Venn%20Diagram,%20Definitions,%20Examples.pdf
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Unit 2 Cover Page(Hand out in Class)
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Adding Fractions:
There are 3 Simple Steps to add fractions:Step 1: Make sure the bottom numbers (the denominators) are the sameStep 2: Add the top numbers (the numerators), put the answer over the denominator.Step 3: Simplify the fraction (if needed).
Subtracting Fractions:
There are 3 simple steps to subtract fractionsStep 1. Make sure the bottom numbers (the denominators) are the sameStep 2. Subtract the top numbers (the numerators). Put the answer over the same denominator.Step 3. Simplify the fraction (if needed).
Multiplying Fractions:
There are 3 simple steps to multiply fractions1. Multiply the top numbers (the numerators).2. Multiply the bottom numbers (the denominators).3. Simplify the fraction if needed.
Dividing Fractions:
Step 1: Turn the second fraction (the one you want to divide by) upside-down (this is now the reciprocal)Step 2: Multiply the first fraction by that reciprocalStep 3: Simplify if needed.
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Estimation 180
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Estimation 180
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Conversion of Fractions:
Mixed to Improper & Improper to Mixed
Follow the link below to print the notes for this page.
http://www.amathsdictionaryforkids.com/mathsCharts.html
Click on Fractions, then click on Conversions
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Multiplication of Fractions:
Follow the link below to print the notes for this page.
http://www.amathsdictionaryforkids.com/mathsCharts.html
Click on Fractions, then Multiplying Fractions
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Division of Fractions:
Follow the link below to print the notes for this page.
http://www.amathsdictionaryforkids.com/mathsCharts.html
Click on Fractions, then click on Dividing Fractions
