Comparing & Scaling Unit: 1.3 Comparing Ratios 1) Learning Target: To compare mixtures I can write part-to-part and part-to-whole ratios.Homework: 1) Complete Notes on pg. 8 of CS Inv. 1 by watching the Zaption Video Tour for CS 1.4.2) 30 mins of MathXL for School Warm-Up: Monica wants to make chocolate milk for her family.

Monica likes it just as much chocolate as milk. Her brother likes it REALLY chocolatey. Her mother wants only milk. Her dad likes just a little chocolate. Help Monica determine the mix for each member of her family.

What ratio of chocolate is needed to make 1 C. of chocolate milk?

What ratio of milk is needed to make 1 C. of chocolate milk?

What is the total ratio of chocolate and milk?

Monica

Brother

Mom

Dad

VOCABULARY :

part-to-part ratio

part-to-whole ratio

HW Review:

part-to-partpart

partpart-to-whole

part whole

5:14 5/14 5 to 145:9 5/9 5 to 9 9:14 9/14 9 to 14

1:3 1/3 1 to 31:2 1/2 1 to 2 2:3 2/3 2 to 3

3:8 3/8 3 to 83:5 3/5 3 to 5 5:8 5/8 5 to 8

6 9 18

8 10

9

10 15

36

25

54

2 4 12

3 4 5

3 12 15301510

These are called: scaling ratios

In table groups work on p. 6 - 7

Part-to-whole Ratio 1 : 4 Scale up 12 : 48 48 oz. pitcher

Double check: 1 can concentrate = 12 oz. 3 cans water = 36 oz. Total = 48 oz.

A. A typical can of o.j. concentrate holds 12 fluid oz. The standard recipe is:

How large of a pitcher will you need to hold the juice made from a typical can? (Show or explain your answer)

B. A typical can of lemonade concentrate holds 12 fluid oz. The standard recipe is:

How large of a pitcher will you need to hold the lemonade made from a typical can? (Show or explain your answer)

Part-to-whole Ratio 1 : 5 ⅓ Scale up 12 : 64 oz. 64 oz. pitcher

Double check: 1 can concentrate = 12 oz. 4⅓ cans water = 52oz. Total = 64 oz.

Part-to-whole Ratio 1 : 5 ⅓ Scale up 12 : 64 oz.

1 Gallon = 128 oz. 1 : 3 (part to part) 1 : 4 (part to whole) x : 128 (scale factor of 32)32 : 128She needs 2 (16 oz.) cans!

1 : 4 (Part-to-whole) Scale up 16 : 64 64 oz. container

15 oz. of lemonade concentrate 1 : 4 ⅓ (part to part)1 : 5⅓ (part to whole) scale factor of 1515 oz : 80 oz

He needs a pitcher large enough to hold 80 oz.

Think of these ratios as equivalent fractions.Hint?

cans of concentrate

juice made in one recipe,

in cansOunces (oz.) of juice she wants to make

Ounces (oz.) of concentrate she needs

Comparing & Scaling Unit: 1.3 Comparing Ratios Did I reach my Learning Target: To compare mixtures I can write part-to-part and part-to-whole ratios.

Homework: 1) Complete Notes on pg. 8 of CS Inv. 1 by watching

the Zaption Video Tour for CS 1.4.

2) 30 mins of MathXL for School