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# What is a number model in math?

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### Quick Answer

**A number model in math is a sentence that illustrates how the parts of a number story are related.** The equation may include addition, subtraction, division and multiplication and may be expressed as words or in number form.

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Number models expressed in number form include 6 + 7 = 13, 12 * 6 = 72 and 24 / 3 = 8. An example of a number model written in words would be, "The area of rectangle A is equal to the product of sides D and E." The same equation can be expressed in numbers as area = d * e.

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## What does "composite" mean in math?

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Full Answer >**In math, a composite number is a whole number that can be divided evenly by a number other than itself and one.**If a number cannot be divided evenly in this way, it is called a prime number.Filed Under: -
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## What is an array in 4th grade math?

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Full Answer >**An array in fourth grade math is a visual model used to help provide an understanding of multiplication concepts.**For example, a multiplication problem can be represented with an array of shapes in rows and columns that are accompanied by a numerical formula, providing better understanding for students.Filed Under: -
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## What is a prime number in math?

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Full Answer >**A prime number in math is an integer greater than 1 that is evenly divisible by only 1 and the number itself.**One is not considered a prime number, because prime numbers by definition have two factors, and the number 1 only has one factor: 1.Filed Under: -
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## What is a landmark in math?

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Full Answer >**A landmark number is a number that makes math simpler by virtue of it being easy to relate to and calculate with, such as the number "10."**Most landmark numbers are multiples of 10.Filed Under: