Multimedia Type Calculator Program and Lesson of Character of Natural Number Using It
Kazumi Yamada kyamada@ed.niigatau.ac.jp
Faculty of Education and Human Sciences Niigata University Japan
Abstract
1 Calculator Program of Multimedia Style I made the calculator program
of the multimedia style which changed the design of the usual
calculator as follows. Each number key of the calculator from 0 to 9 is
replaced by the key of a different animal mark. From now on, these keys
will be called animal buttons. If an animal button is pushed, the cry
of the animal will carry out. If one of "+, , * /, =" is pushed, this
symbol will be read in a child's voice. The formula made from his
keystroke and the answer of this calculation will be appeared on the
display using animal marks. This calculator will be used for
motivation. When a child solves a problem, the calculator of the design
which replaced the picture of each animal in the simple figure is used.
Each number key of this calculator from 0 to 9 is expressed with
"œC›CŸCžC¡CŒûC£C¢C¥C¤". These keys will be called
figure buttons. It becomes easy for a child to write down formulas on
his note by replacing animal buttons with figure buttons. The next
restrictions are imposed so that it can use also for a schoolchild.
When an answer can be found in a natural number, the answer is
displayed using one or two buttons. The "?" mark is displayed when it
cannot be found. For example, if the values of a figure button are
Ÿ‚QCŒû‚TCand ¢‚V, then 5+2=7 is displayed likeŒû\Ÿ¢.
2 Interactive Problem Solving The problem "Guess the number of each key
of the calculator covered by the pattern of the animal by carrying out
calculation of single figures several times." is given to a child. In
order to solve this problem, he will need to experiment about various
cases repeatedly. The child who was doing calculation from curiosity
comes to pay his attention to the pattern of formulas, or the character
of a natural number gradually. He is going to guess using calculation
results and confirm it. If this problem is solved using the sign of
"+,, *, /" freely, he will notice various problems will produce
according to how many kinds of symbols of operation is admitted. He
comes to challenge the problem of inferring the number of the key of
the calculator covered by the figure mark only using any one of four
kinds of the symbols of operation. 3 Learning Effect
By repeating building and trying a hypothesis and inferring this using
the character of a natural number, he can study carrying out
mathematics in experience. It is an aim of this subject by
investigating the character of a number rather than only carrying out
computation practice that a child comes to have interest concern in the
beauty and the intellectual fun in the world of a natural number. Since
this problem is abstract and mathematical, there are many children who
feel difficulty. However, a multimedia calculator makes that forgotten.
Learning environment with presence can be made by utilizing multimedia.
A child who dislikes mathematics comes to learn actively with absorbed
interest.
