Proportions Test Review
Presentation
•
Mathematics
•
7th Grade
•
Easy
+5
Standards-aligned
Ashley Kellams
Used 5+ times
FREE Resource
11 Slides • 14 Questions
1
Reviewing prior knowledge
Ratio:
A comparison of 2 quantities by division.
Ex: a to b, a:b, a/b
The number of dogs compared to the number of cats in an apartment complex is represented by the model shown.
EX: 1 to 3, 1:3 , 1/3
2
What is a rate?
Is a ratio that compares 2 quantities in different units. finding rates shows how one thing changes in term of another thing. example : If I walk 5 miles in 2 hour, Do you think that I will walk the same miles in 3 hours if I keep the same pace ?
What is a unit rate?
Rate that has a denominator of 1.
3
Multiple Choice
The ratio of girls to boys at basketball practice is 2:3. If there are 12 girls at practice then how many boys are there?
15
18
20
21
4
Multiple Choice
7
8
9
10
5
Ex. 405 miles in 9 hours
Ex. 4 packs of batteries is $22.16
6
Match
Match the following with the Unit Rates
$5 for 15 gallons of gas
12 gallons of soda for $9
21 gallon of pudding for 0.50
232 gallon of water for $3
$25 for 5 gallons of paint
$3 per gallon
$0.75 per gallon
$1.00 per gallon
$0.89 per gallon
$5 per gallon
$3 per gallon
$0.75 per gallon
$1.00 per gallon
$0.89 per gallon
$5 per gallon
7
Multiple Choice
Alicia drove at a constant speed and traveled 182.4 miles in 3 hours. What is her rate in miles per hour?
60.8 miles per hour
547.2 miles per hour
56 miles per hour
8
9
10
Multiple Choice
32=64
Proportional?
True
False
11
Multiple Choice
74=42
Proportional?
True
False
12
When two or more ratios are equivalent
"Proportional" means that both ratios should reduce to the same fraction
13
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?)
14
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)?
15
Find the scale factor you are going to use.
16
Fill in the Blanks
What is the scale for the following ratio?
65=1815
Type answer...
17
18
Multiple Choice
What number would make this a true statement?
1
3
9
8
19
Fill in the Blanks
M8=4812
What's the value of M?
Type answer...
20
Fill in the Blanks
60400=T1000
What's the value of T?
Type answer...
21
Multiple Choice
Choose the correct proportion for the following problem:
Shania uses 12 sheets of
paper for every pencil. If she uses 3 pencils, how many sheets of paper will she use?
22
Multiple Choice
Choose the correct proportion for the following problem:
Jason keeps 12 pieces of gum for every 3 bags of Takis in his backpack. If Jason has 4 pieces of gum, how many bags of Takis does he have?
23
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
24
1st step: Blue ratio
2nd step: Red ratio
3rd step: Cross multiply
4th step: Solve for x
25
Multiple Choice
m=80
m=81
m=1
Reviewing prior knowledge
Ratio:
A comparison of 2 quantities by division.
Ex: a to b, a:b, a/b
The number of dogs compared to the number of cats in an apartment complex is represented by the model shown.
EX: 1 to 3, 1:3 , 1/3
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