Monster Multiplication Arrays
Roll two dice and build a monster array! Make rows and columns, discover repeated addition, and solve multiplication challenges in five playful rounds.
Roll the dice, then tap squares to reveal monsters. Tap a monster again to remove it. Make a complete rectangle with the right number of rows and columns!
How Do Multiplication Arrays Work?
An array is a rectangle made of equal rows and columns. For example, 3 rows of 4 means 3 horizontal rows with 4 monsters in each row. That is 4 + 4 + 4 = 12, or 3 × 4 = 12.
4 + 4 + 4 = 12 • 3 × 4 = 12
Three complete rows, four monsters in each row. The rectangle can be anywhere on the grid.
The first die tells you the number of rows. The second die tells you the number of columns.
Tap empty squares to add monsters. Tap again to remove them. Your rectangle can be anywhere on the 6 × 6 grid.
Make sure the monsters form one solid rectangle with exactly the requested rows and columns.
Choose the repeated addition, multiplication expression, and total number of monsters.
What Happens When We Rotate an Array?
Turn a 3 × 4 array into a 4 × 3 array. The rows and columns switch places, but the total stays the same!
3 × 4 = 4 × 3 = 12
Classic Arrays: roll the dice, build the array, and answer three questions.
Arrays + Commutative Property: do the same, then rotate your array, tap the two factors to swap them, and check whether the total changed.