Rates continued
Presentation
•
Mathematics
•
12th Grade
•
Practice Problem
•
Medium
Maria Woodbury
Used 3+ times
FREE Resource
12 Slides • 7 Questions
1
Simple
Growth rate
Running rate
Interest rate
Wage or Salary
2
Multiple Choice
Jack can type 70 words per minute. How many words can he type in 30 minutes?
3
Match
Match the following
360 km on 30L
200km on 12.5L
100km on 5.5L
423km on 7.9L
12km/L
16km/L
18.18km/L
53.54km/L
12km/L
16km/L
18.18km/L
53.54km/L
4
Comparing Rates
Conversion of units is critical!!!!
Can solve in different ways-
either with "cross multiplying" or unitary method
For example: My car can do 360km on 27L of petrol. How far can it travel on 15.5L?
5
For example:
My car can do 360km on 27L of petrol. How far can it travel on 15.5L?
6
Rates and tables
Some rates can be in table form- you will need to read the tables carefully.
7
8
Rates and crazy units!
Power- is measured in Watts (W)
Energy- is measured in Joules (J)
Electrical Energy - is measured in kilowatt-hour (kWh)
1kWh=3.6J
Consumption is then a rate expressed over time
Energy ratings
9
10
11
12
13
14
15
Multiple Choice
Convert $15/kg, to $/g
16
Multiple Choice
A hose fills a 10L bucket in 20 seconds. What is the flow rate per minute?
0.5L/min
1L/min
10L/min
30L/min
17
Match
Match the following
1kWh
5kWh
500W in 1 hour
10W in 1 hour
1000W in 1 hour
5000W in 1 hour
0.5kWh
0.01kWh
1000W in 1 hour
5000W in 1 hour
0.5kWh
0.01kWh
18
Poll
Which is better?
100km/7L
20km/1.3L
150km/8L
19
Reorder
Reorder the following rates of typing words per minute, from smallest to largest
30 words in 5 minutes
32 words in 4 minutes
45 words in 5 minutes
50 words in 5 minutes
44 words in 4 minutes
Simple
Growth rate
Running rate
Interest rate
Wage or Salary
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