A multiplication chart, also known as a multiplication table, is a table that organizes the 100 basic multiplication facts.
How to use a multiplication chart
To use a multiplication chart, first look at the rows and columns in grey in the figure above. Rows are read horizontally from left to right, while columns are read vertically from top to bottom. The green diagonal on the chart represents the squares of the numbers, namely 1 × 1 = 1, 2 × 2 = 4, 3 × 3 = 9, etc.
Use the green diagonal to understand how the multiplication chart is read. The value in the green diagonal is the product of the column and row values that align with it in grey. For example, 25 is the product of 5 and 5. 20 is the product of 4 and 5 and 5 and 4, etc.
In other words, to use the multiplication chart, choose the two values that you want to multiply from the grey row and column, then determine what value an imaginary horizontal and vertical line (drawn from the grey column and row respectively) would intersect at to determine the product of the two values.
See also basic facts, reciprocal.