What is a rectangular array?
A rectangular array consists of a set of objects arranged in a similar way to a rectangular grid. It is one way of packing objects (e.g. eggs) efficiently. Supply students with drawings of various rectangular arrays of dots and ask them to count the number of dots in each array.
What is square array?
‘Square arrays’ is concerned with magic squares and latin squares. An n × n magic square, or a magic square of order n, is a square array of numbers (usually the numbers from 1 to n2) arranged so that the sum of the numbers in each of the n rows, each of the n columns, or each of the two main diagonals is the same.
What is an array in math?
An arrangement of objects, pictures, or numbers in rows and columns is called an array. Arrays are useful representations of multiplication concepts (among other ideas in mathematics). This array has 4 rows and 3 columns. It can also be described as a 4 by 3 array.
Can you factor 18?
Factors of 18: Testing the integer values 1 through 4 for division into 18 with a 0 remainder we get these factor pairs: (1 and 18), (2 and 9), (3 and 6). The factors of 18 are 1, 2, 3, 6, 9, 18.
Can a number be made into more than one array?
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).
Can a two row array be made of even numbers?
Even numbers can be made into two-row arrays, but odd numbers cannot – there being always one item left over. The making of two rows highlights the fact that even numbers are always divisible by two.
How to multiply the number on the side of the array?
Multiply the number on the side of the array by the number at the top of the array. Close Mouse instructions: Move around the screen and select a Button Keyboard instructions: Use the Tabkey to move through the screen. Use the Shiftand Tab keys to move backwards through the screen.
Which is an example of a rectangular array?
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 12.