Lesson #1 title: PART 1 = Introduction to RATIOS
Date:
THROUGH-LINE: Image – reflecting God wonderfully and magnificently designed the human body in proportions.
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A ratio is a relationship that exists between the amounts of TWO NUMBERS (example: 3 to 4; 3 : 4; fractional form ).
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OUTCOMES:
1. Write a ratio from a given pictorial representation.
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2. Express a given ratio in multiple forms, such as 3:5, 5, 3 to 5.
3. Explain the part/whole and part/part ratios of a set
MATERIAL NEEDED: highlighters, pencil, blue pen
Example #1: Use this diagram to express a variety of ratios. (obtained from Math 6 Assessment Highlights 2012-13)
What is the ratio of the following combinations?
words
symbol
squares to triangles
squares to circles
circles to triangles
circles to squares
triangles to all
shapes
all shapes to squares
RATIO (definition):
Where would you use a ratio in your life?
fraction
TYPE of ratio
L1(2)
Example #2: Draw a SKETCH of each of these ratio scenarios.
a) What is the ratio of VOWELS to CONSONANTS in ‘TIESSEN’?
Type of ratio:
b) What is the ratio of CONSONANTS to ALL LETTERS in ‘TIESSEN’?
Type of ratio:
c) To make iced tea you add 1 part sugar to 3 parts tea.
Type of ratio:
d) School choir has more girls than boys. The girls outnumber the boys four to one.
Type of ratio:
e) List a ‘part to whole’ ratio you observe in our classroom.
f) List a ‘part to part’ ratio you observe in our classroom.
g) List a ‘whole to part’ ratio you observe in our classroom.
L1(3)
YOUR TURN 
#1. Use this diagram, list these ratios:
Adults to kids:
Type of ratio:
Kids to adults:
Type of ratio:
Kits to total people:
Type of ratio:
How many adults would be needed for a class of 30 students using this same ratio?
#2: Use this diagram to express a variety of ratios. (obtained from Math 6 Assessment Highlights 2012-13)
words
squares to triangles
circles to triangles
circles to squares
circles to all shapes
all shapes to squares
#3:
symbol
fraction
TYPE of ratio
L1(4)
#4.
#5: Draw a SKETCH of each of these scenarios.
Ratio of boys to girls is 3 to 1.
Ratio of bikes to cars is 1:5
Ratio of airplanes to cruiseships is 3 to 3.
#6: This pie chart shows how grade 6 students answered a survey about
the pets they have at home. Twenty people said they have a pet
hamster at home.
a) What percent say they have a hamster? LOOK at the graph and
answer!!!
b) What percent say they have a dog? LOOK at the graph and
answer!!!
c) How many people have a cat (assume the number of rabbits = number of cats)?
d) How many people have a dog (assume the number of rabbits = number of cats)?
e) How many IN TOTAL answered the survey?