Proportional Relationships T 4 - Use PR to solve multi ratios

Ratios are a comparison of 2 quantities by division.

• Ratios are an ordered pair of numbers.

• Formats: Fraction form, Word form, Colon form

  ORDER MATTERS!

  What is the ratio of stars to red circles in this image?

• • 4 to 11

• • 4 to 7

• • 7 to 4

• • 11 to 4

Which of the following represents the ratio of lemons to fruit?

• 10:10

• 10:20

• 10 to 20

• 10:10

Which statement is true about the ratio 7:8?

• It could mean 7 out of 8 students completed a homework assignment.

• It could mean there are 7 girls and 8 boys in a classroom.

• The ratio could mean that there are 7 students who did their work and 4 who did not.

A rate compares two quantities with DIFFERENT units.

Driving 120 miles in 2 hours

The units are miles & hours

• .

• .

• .

• .

A unit rate is a rate that is simplified so that it has a denoinator (2nd number) of 1 unit. It tells us how much for one.

Which is a UNIT rate?

• 100 miles / 3 hours

• 35 miles / 1 hour

• 70 miles / 2 hours

How do you simplify to find the unit rate?

Divide by the ______ number.

• second

• 2nd

Find the unit rate (how many avocados per bag):

42 avocados in 7 bags

• 7 avocados/bag

• 6 avocados/bag

• 7 bags/avocado

• 14 avocados/bag

Find the unit rate (how many minutes per video):

24 minutes to watch 4 videos

• 4 minutes/video

• 4 videos/minute

• 6 minutes/video

• 8 minutes/video

Find the unit rate:

40 slices in 5 pizzas

______ slices per pizza

• 8

• 8 slices

Find the unit rate:

48 markers in 8 packs

______ markers per pack

• 6

• 6 markers