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Grade:
ElementarySubject:
Mathematics |

Posted Tue Apr 18 17:43:59 PDT 2000 by Rick Newell (r.newell@home.com).

GOfigure email numbers game

Clik-fx Inc., Markham, Ontario, Canada

Materials Required: none

Activity Time: 10 minutes

Concepts Taught: Basics - addition, subtraction, multiplication, division

GOfigure, a classroom activityHere is the challenge. Take these eight digits 1, 2, 2, 9, 3, 6, 8, and 5

Now find a pattern by using as many as you can.

Rules: the pattern must have one rule that is used at least twice. for example

the pattern 1, 2, 3

the pattern 1, 3, 9There are over 300 patterns and 54 of them use all eight digits, put the above

numbers on the board and see how many the class can find. Watch the CRUNCHING

begin as they look for the eight digit patterns.You may want to do a lesson patterning before they start searching. Following

is an outline of patterns used in this exercise.

What is a pattern?The aim of the game is to create numeric patterns from the digits students

have available to them.Ask the question Is "2,4" a pattern?

Asking this question beforehand could serve as an effective introduction to

the game, especially for younger students. If everyone agrees that two numbers

are not enough to show a pattern, they're probably all ready to begin.If, however, someone says that "2 , 4" is a pattern, ask that person what number

comes next and why. The answer often given is 6, because you're adding 2 each

time. But, depending on their math experience and abilities, other students

may be quick to point out, for example, that "8" or "16" are two other possibilities,

and will be able to explain why.e.g. 2, 4, 6 (add 2 to the previous number each time)

2, 4, 8 (multiply the previous number by 2 each time)

2, 4, 16 (square the previous number each time)

Each pattern is formed by using a different rule, but it's not until the third

number in the sequence that the rule being used repeatedly becomes clear. Only

then can the pattern be identified. Discussions around a few examples will help

students see why they need to use at least three digits to form a recognizable

pattern and how the rule is applied at least twice.A note about graphic or visual patterns:

Some students, especially younger ones, may want to use numbers that create

a visual pattern such as 1,1,9,9,3,3. Since no one rule is being followed consistently

to create this pattern, it is not a mathematical pattern and therefore does

not qualify for this exercise. In the example shown first, you multiply the

first number by 1, then add 8 to the second; then multiply the third by 1 and

subtract 6 from the fourth then multiply times 1 again (*1, +8, *1, -6, *1).

Who knows what number might come next?For answers, more information on this activity, and additional activities see

www.clik-fx.com