1. Licensing information
Users should treat this material as a working draft. This material can be used in its current form, customized, and/or printed or displayed by the user.
The author(s) request feedback on all materials so that they can be continually improved and updated.
This material is licensed under the Creative Commons Attribution-Share Alike license: (
Author: Kevin Hall
Wording for the legal statement above is adapted from the legal statement for Trigonometry, published in 2009 by The cK-12 Foundation:

2. 2.1 Packet--PowerPoint
These practice problems go with #5-9 in the “2.1 Packet” of this unit.
You need to view the slides in “Presentation mode” on your computer. It won’t look garbled when you do that. On a PC, just hit F5.

3. How to use these slides
Display a slide, then walk around the room encouraging students as they work.
Praise as many students as you can. This part of the lesson is specifically designed to allow you to:
See whether students understand the lesson so far.
Praise whatever they do correctly.
Some students will finish both questions on a slide, some will finish only 1. That’s ok.
Be mobile. A remote mouse clicker will mean you can gradually display the whole slide while walking around the room praising and coaching.

4. Reminder
Parts like this (below) look garbled, but when you view the slide show, the different pieces appear at different times, so it’s not a problem.
Out of 5
Out of 10
Out of 15
Out of 20
Out of 25
Out of 30
Out of 35
Out of 40
Out of 45

5. 5).
Out of 5
Out of 5
Out of 10
Out of 15
Out of 20
Out of 25
Out of 30
Out of 35
Out of 40
Out of 45 5
Adds up to 27 3 3 3 3 3 3 3 3 3 3
Answer: x = 27
Out of 20
Out of 20
Out of 40
Out of 60
Out of 80
Out of 100 20
6).
What percent is
11 out of 20? 15 11 20 x
100 = 11 10 11 11
Adds up to 55 11 11 20 55
100 = 11 5 11 11 20
55 % =

6. Please fill in these numbers in the blanks for #8-9:
8). About of the calories in peanut butter come from fat (that’s true). If you eat 48 calories’ worth of peanut butter, how many calories come from fat?
9). You and some friends buy 11 raffle tickets together and agree to split the money if one of the tickets wins. The prize is $99. You bought 7 of the tickets for your group. 3 4

7. 5 10 5 ?? cal. fat 3 cal. fat x = 4 cal. total 48 cal. total
8).
?? cal. fat
Out
of 4
3 cal. fat x
Out of 4
Out of 8
Out of 12
Out of 16
Out of 20
Out of 24
Out of 28
Out of 32
Out of 36
Out of 40
Out of 44
Out of 48 = 5
4 cal. total
48 cal. total
Adds up to
Answer: x = 36 3 3 3 3 3 3 3 3 3 3 3 3 3 36
9).
?? your dollars
7 your share x =
11 total shares
99 total dollars
Out
of 11
Out of 11
Out of 22
Out of 33
Out of 44
Out of 55
Out of 66
Out of 77
Out of 88
Out of 99
7 yours
63 yours 10 =
11 total
99 total 7 7 7 7 7 7 7 7 7 7 5
Answer: x = 63
Adds up to 63