# How to write a math array

You can use symbols, such as circles, squares or triangles, to write math facts in arrays.

## What is an array in math

If asked to divide the apples equally between 12 students, for example, the class would produce a 12 by 3 array, demonstrating that each student would receive three apples if the 36 were divided equally among the 12 individuals. For example, for the number 12, the possible rectangular arrays are: Thus, we find that the factors of 12 are: 3, 4, 2, 6, 1 and They studied the Commutative Property of Addition earlier. Exploring factors in this way will lead to the discovery that some numbers can be made into more than one array that is; composite numbers , and some numbers can only be represented by one-row arrays that is; prime numbers. Arrays can make learning math easier for visual learners. The numbers in multiplication sentences have special names. Your students used equal groups to multiply in second grade. It is a 5 by 4 array.

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Another investigation of factors using arrays is the search for numbers that can form square arrays; namely, the square numbers. If asked to divide the apples equally between 12 students, for example, the class would produce a 12 by 3 array, demonstrating that each student would receive three apples if the 36 were divided equally among the 12 individuals.

### Arrays in math 2nd grade

When the order of the factors in any multiplication sentence changes, the product does not change. An arrangement of objects, pictures, or numbers in columns and rows is called an array. Notice that the rows in each array are equal. The number of columns is the first number in the math equation; the number of rows is the second number in the math equation. Think of the rows as equal groups. The order of the factors changed, but the product stayed the same. Odds and Evens The concepts of odd and even numbers are somewhat bewildering to many young children, so having a method to model numbers that clearly shows the difference between odds and evens is crucial. Photo Credits. Another investigation of factors using arrays is the search for numbers that can form square arrays; namely, the square numbers. When you show students the connection between equal groups and arrays, students can easily understand how to use arrays to multiply. Exploring factors Another approach to discovering factors of numbers is to begin with a particular whole number and make as many different rectangular arrays as possible - see the Making Shapes problem. Students should be familiar with the Commutative Property because it also applies to addition. Using Arrays to Show Multiplication Concepts: Overview Students can more readily develop an understanding of multiplication concepts if they see visual representations of the computation process. The numbers that are multiplied are called factors.

Use the first number to determine how many symbols to draw in the columns. Students should be familiar with the Commutative Property because it also applies to addition. For example, they can picture students in a marching band arranged in equal rows or chairs set up in rows in an auditorium.

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