2What is Array Multiplication? An arrangement of objects into rows and columns that form a rectangle. All rows must be filled. Each row and column has the same number of objects.Multiplication arrays are blocks of dots or other shapes that show any multiplication problem visually.By arranging multiplication arrays using groups, we can understand what multiplication is: number of items in a number of groups.
3How to arrange the array 4 X 5 =The first number in the multiplication fact is represented by a row of symbols across the top.The second number in the multiplication fact is displayed downward from the first symbol in the top row.
5Arrangement continued Once you have completed your foundation, (click here to see what your foundation should look like)Fill in/complete the rectangle (click here to see what the complete rectangle should look like).Count all the symbols in the rectangle and POOF you have your answer.
13Example REMEMBER: Each column stands for 1 package (or six -pack). Louise buys four packages of juice boxes. Each package has six juiceboxes in it and is called a “six- pack.” Show the four packages as anarray.Think: there are 4 groups ( 4 packages of juice boxes). Eachgroup has the same number of boxes (6) in it.Draw a 4 –by- 6 array to show the 4 groups.REMEMBER:Each column stands for 1 package (or six -pack).
14Let’s PracticeIf there are seven tables and five chairs per table, how many chairs are there in all?
15Lets check.Well how many tables are there (they represent the columns)?SevenNow how many chairs at each table (they are represented by the rows)?FiveOnce everything is filled in, you are counting five chairs at each of the seven tables!!Got It??!!