Proportions Notes

Presentation

•

Mathematics

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5th - 6th Grade

•

Hard

•

CCSS

6.RP.A.3B, 7.RP.A.2A, 6.RP.A.3A

Standards-aligned

Jennifer Mackie

Used 1K+ times

FREE Resource

7 Slides • 12 Questions

Proportions Notes

by Jennifer Mackie

Make these 2 ratios equivalent

Fill in the Blanks

What is the scale for the following ratio?

$\frac{5}{6}=\frac{15}{18}$

Type answer...

What's missing?

Fill in the Blanks

What's the scale?

$\frac{8}{32}=\frac{12}{48}$

Type answer...

Proportion

an equation that shows two ratios that are equivalent

It's just like the ratio table but with an equal sign in between.

Fill in the Blanks

$\frac{8}{M}=\frac{12}{48}$

What's the value of M?

Type answer...

Fill in the Blanks

$\frac{400}{60}=\frac{1000}{T}$

What's the value of T?

Type answer...

Steps to solving a proportion

1. Draw arrows showing which direction you will be moving. An arrow needs to be pointing to the variable.

Arrows should be on BOTH sides of the proportion going in the same direction! (Which way is easiest to go?)

Step 2

Find the factor needed to multiply or divide to move in the direction you chose.

You may need to simplify the ratio to find a good factor to use.

Are the arrows pointing to the larger number (MULTIPLY) or the smaller number (DIVIDE)?

Step 3

Mulitiply the other side by the factor found.

Multiple Choice

Determine whether each pair of ratios forms a proportion

Proportion

Not a Proportion

Multiple Choice

Determine whether each pair of ratios forms a proportion

Proportion

Not a Proportion

Multiple Choice

The ratio of a quarterback's completed passes to attempted passes is 7 to 8. If he attempted 24 passes, how many did he complete?

21 passes

8 passes

3 passes

27 passes

Multiple Choice

It takes Emma 18 minutes to type and spell check 14 pages of manuscript. How long will it take her to type and spell check 77 pages?

18 minutes

99 minutes

60 minutes

1,386 minutes

Multiple Choice

If a car travels 280 miles in 7 hours, how far will it travel in 12 hours?

480 miles

1,960 miles

84 miles

25 miles

Multiple Choice

Ramon travels 20 miles in 20 minutes, how many miles can he travel in 120 minutes?

120 miles

200 miles

10 miles

40 miles

Multiple Choice

12 ounce shampoo bottle lasts Mike 16 weeks. How long would you expect an 18-ounce bottle of the same brand to last him?

24 weeks

6 weeks

30 weeks

20 weeks

Multiple Choice

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

2.5 cups milk

1.75 cups milk

2 cups flour

2.25 cups milk

Proportions Notes

by Jennifer Mackie

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