what is a number model?
Since this is not my area of expertise, I searched Google under the key words "number model" to get these possible sources:
http://www.minet.uni-jena.de/~novak/model.html
http://72.14.253.104/search?q=cache:Jv_3THbD6vIJ:andean.kulture.org/owen/owen1993chapter2.pdf+%22number+model%22&hl=en&ct=clnk&cd=3&gl=us&client=safari
Here is a simple definition that I found:
"Definitions of number model on the Web:
A number sentence that models or fits the situation. An equation."
I hope this helps. Thanks for asking.
A number model is a representation of a mathematical relationship or equation using numbers and symbols. It is a way to express a mathematical relationship or problem in a concise and structured way.
To understand and create a number model, you need to consider the problem or relationship you are trying to represent. Here are a few steps to follow:
1. Identify the variables: Variables are the unknown quantities or values that you are trying to find or represent. Assign a letter or symbol to each variable to represent it.
2. Identify the operations: Determine the mathematical operations involved in the problem or relationship. Common operations include addition (+), subtraction (-), multiplication (*), and division (/).
3. Write the equation: Using the variables and operations, write an equation that represents the relationship or problem. The equation should show how the variables are related and how the operations are applied. For example, if you are trying to represent the relationship "twice a number plus five equals fifteen," you could write the equation as 2x + 5 = 15, where x represents the unknown number.
4. Solve the equation: To find the value of the variables, you need to solve the equation. This involves performing the necessary operations to isolate the variable on one side of the equation and find its value. In our example, you would subtract 5 from both sides to get 2x = 10, and then divide both sides by 2 to find that x = 5.
In summary, a number model is a concise representation of a mathematical relationship or problem using numbers and symbols. To create a number model, identify the variables, operations, and write an equation that represents the relationship. Then solve the equation to find the values of the variables.