Tuesday, June 23, 2015

Summer Math Project Board

The project ideas listed below are some ways to do math over the summer. Give yourself a challenge and work to earn at least 50 points.
Math Project Board
Make a math vocabulary dictionary.  
20 points
 Write a compare and contrast essay about area and perimeter.
20 points  
 Make a math poster explaining about your topic.
30 points
Watch a Khan Academy video and complete the practice questions.  (Create an account)
10 points
Make a math puzzle and include a solution to the puzzle
10 points
Long division practice sheet

10 points
Create an informational booklet about your math topic.
30 points
Solve an investigation problem
30 points
Create a math song/skit to learn a math skill.
20 points

Examples of "Investigation Problems"
  • What are the different ways can you find the area of each polygons? Write a number sentence or an algebraic expression that would represent each of your methods.      
  •  What different shapes can you make with 5 cubes?  Compare the surface area of each of these different shapes, what do you notice?  Compare the volume of the 3-D shapes what do you notice?

Examples of "Math Puzzles"
  • Operations Puzzle- Which operations (+, -, X, /) must be performed to get the solution?  
    •  For example
      (4 * 1) * (6 * 2) = 1 
      (The correct answer is (4 + 1) - (6 - 2) = 1 or in simplest form 5 - 4 = 1) 
    •  More examples   (6 * 4) * 12 = 12;  (4 * 2) * (4 * 3) = 24;  (6 * 5) * (9 * 2) = 19
  • Equations Card Game- Write an equation showing (First Expression)=(Second Expression)
    • For example:  6 cards numbered 6, 4, 8, 7, 2, 10                                                             (Possible answers 8+2=6+4, 10-4= 8-2, and using Exponents 10^2 - 8^2 =  6^2)
    • Game directions and more math puzzles are at:  Home Page for Math Games and Puzzles  
Math Topic Ideas for Project Board (above)
Area, Volume, Surface Area Least Common Multiple/ Greatest Common Factor
Ratios 3-D Shapes
Equations                       Experimental Probability
Number  Patterns Scientific Notation
Inequalities Fractions

Slope of a line Parabolas and Quadratic Equations

Thursday, April 2, 2015

Percent of Body Height

Complete the chart below by measuring your body parts and total height.

Body Part                   height (in)                  total height                % of body
head                           ________                  _________                ________
torso                           ________                  _________                ________
leg                               ________                  _________                ________
neck                           ________                  _________                ________
foot                             ________                  _________                ________


Example
Body Part     Body Part Height (in.)  Total Body Height(in)  Work Steps   % of body
head                           10 inches                   72                        10/72=.14       14%
torso                          25 inches                   72                        25/72= .35       35%
legs                            30 inches                  72                         30/72= .42       42%
neck                           4 inches                     72                         4/72=  .05        5%
foot                             3 inches                    72                          3/72=  .04       4%
                                                                                                            1.0       100%

Friday, March 27, 2015

Writing Addition and Subtraction Expressions

Writing Addition and Subtraction Expressions

Expressions can be modeled using a bar diagram like the one below.  This example shows the number of biographies (x) currently in our classroom library and the increase of 13 new biographies from the school book fair.  This expression x + 13 represents the total number of biographies the library has now.


 This expression can also be written as 13 + x to represent this situation.   One way to test the equivalency of the expressions is to substitute values for x and see if the sum of both equations are still the same.   If x = 2,   x+ 13 = 13+ x,   2 + 13 = 13 + 2,   If x= -1   -1 + 13 = 13 + -1
As a result of the commutative property of addition these expressions are also proven equivalent.


Write my own algebraic expression...
1. Start with an input such as "12" (miles from home to downtown)  
2. Add in a variable such as "d" (distance traveled) 
3. Put it together into a situation like I want to get downtown but have already traveled d miles.  How far do I still have to go?
4. Define your variable(s)  D= distance traveled.  
5. Finally, Write the expression   12 - d
Now test out your algebraic expression....  If d= 6.5 how far is the distance from downtown?
12- d   Substitute in 6.5 for d,   12-6.5=  5  
If d= 6.5, I have to go only 5 more miles.

Sample Practice Questions about writing expressions.  Write an algebraic expression to represent each of the following situations.
  • The height (h) increased by 6 inches.  
  • 43 more than (t);  t= time
  • Carrie sold 50 bags of popcorn today.  Carrie sold (p) fewer bags than Terry.    
  • Seven less than a number (n)




Tuesday, March 10, 2015

Graphing on a Coordinate Plane

Graphing Stories

Does a graph always begin at the origin?  

What is the steepest part of the graph where it shows the greatest increase?

We have been learning from graphing videos and answering some of these questions.

Here is some graphing vocabulary to help springboard our discussions.
y-intercept-  the point on a graph where the line crosses the y-axis.
slope- a measure of the steepness of a line.  (Change in 2 y values divided by Change in the 2 matching x values)