CH 2.3 Shadows and Proportions Proportions and Indirect Measurement
7.RP.3a Day 1 first day Objective: I can solve proportions.
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Transcript of 7.RP.3a Day 1 first day Objective: I can solve proportions.
7.RP.3aDay 1 first day
• Objective: I can solve proportions.
Journal
• List as many fractions that you can that are equal to ½. Example: 2/4
• Try to list fractions that no one else at your table will think of.
Journal
• Compare fractions with your table. Who has the most unique fractions?
• Who in the class has the largest number?
Notes
• A proportion is two fractions that are equal to each other
Notes
• If we are missing one number we can figure it out.
• Work with your table to solve for the question mark. Be ready to explain your answer.
Notes
• What if it’s not an obvious answer?
• Work with your table to solve this proportion. Be ready to explain your answer.
Notes
• Proportions can be solved using our calculator.
Notes
Notes
• Instead of using a “?” we replace it with a letter, called a variable.
Notes
• Instead of using a “?” we replace it with a letter, called a variable.
• A variable is any letter that stands for an unknown number.
Notes
• Instead of using a “?” we replace it with a letter, called a variable.
• A variable is any letter that stands for an unknown number.
• Common letters are
Notes
Notes
7.RP.3aDay 1 second day
• Objective: I can solve story problems involving proportions.
Journal
• Solve the proportion.
• Write your own proportion. Exchange with your neighbor and solve their problem.
Review
𝑎8
=59
Review
𝑟2=74
Review
62=3𝑣
Quiz
816
=𝑥80
NotesDay 1 second day
• Katie and some friends went to buy fruit smoothies. They go to a health food store that advertises a sale of 2 fruit smoothies for $5. How much would 6 smoothies cost?
• Write a proportion and solve it.
Notes
• After 2 hours, the air temperature had risen 7. Write and solve a proportion to find the amount of time it will take for the temperature to rise another 13.
Notes
Olivia bought 6 containers of yogurt for $7.68. How much would Olivia pay for 10 yogurts?
Notes
• Eugene bought six packages of blueberries for $18. How many packages can he buy for $6.00?
Notes
• If you can buy 12 seedless watermelons for $24, how many can you buy for $8?
Notes
• A painting is 3 inches tall and 4 inches wide. If it is enlarged to a height of 12 inches, then how wide would it be?
Notes
• Maria bought 15 Granny Smith apples for $9. How many can she buy with $108?