Math Chapter 14 Division Facts through 9 

Lesson 1;

You can use arrays to find equal groups;

            

Using square tiles, paper squares, cereal pieces try:

  1. How many groups of 6 are in 36?
  2. How many groups of 5 are in 25?
  3. How many groups of 3 are in 18?
  4. How many groups of 4 are in 32?

Lesson 2;

When a number is divided by itself, the quotient is always 1.

When a number is divided by 9 the quotient is always that number.

               

When zero is divided by any number, the quotient is always zero.

Try dividing using a calculator to see the 'zero property of division' and the 'one property of division"  at work;

Lesson 3;

You can use a multiplication table to help you divide...

72 divided by 9 =            ( 9 x ? = 72)     inverse operation                     

Go down row 9 until you find 72 and then go across until you reach the first column...  8.

Lesson 4;

Four ways to find the quotient;

                    Tiles/Arrays                                        Counters

                Table... Skip counting by 9's

 

                Repeated Subtraction

Copy and complete;

       

Practice your division facts at these internet sites;

Funbrain.com's MathCar Racing Game
The ArithmAttack
Checking Division
Flashcards for Kids! Sponsored by CANITech
Multimedia Educational Materials in Flash

Problem solving using a table;

During summer school, Sarah reads 3 books each week.  After six weeks of summer school. how many books has Sarah read?

  Sarah read 18 books in Summer School.

John bought a 36 ounce box of cereal for his breakfast.   If John eats 4 ounces of cereal each morning for breakfast, how long will his box of cereal last?

John's box of cereal will last for 9 days.

Lesson 5 - Choosing the Operation

You can solve many math problems simply by adding, subtracting, multiplying, or dividing.  Here are some hints to help you choose which operation you need to use to solve your problem.

Addition;
if you are joining groups with different sizes
how many in all?,  all together?
Subtraction;
if you are comparing two different amounts
how much more?,   how many are left?
Multiplication;
if you are joining groups with sizes
how many in all?,  all together?
Divide;
if you are separating a total into groups of equal size
is there enough for __ groups?,  How many ____ on each ____?  how many ____ should he get?

Deciding which operation to use depends on the question and the information given to solve the problem.

Technology Integrations;

Kid Pix ... Create your own story problem 1) Use stamps to create a picture for your problem,  2)  Use type text to write your story problem, 3) exchange it with a friend to find the solution.

Internet Sites involving problem solving skills;

The Math Forum Elementary Problem of the Week

Elementary Brain Teaser

http://www.rhlschool.com/math.htm

ThinkQuest Library of Entries Medieval Castle Problem solving

SSS Search Results list of lessons on the web

Math Maven's Mysteries

http://www.dupagechildrensmuseum.org/aunty/challenge.html

Goldy's Glide - October 1999 (CSMP)

Snowday Stew Main Page

 

 
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