What is grid method multiplication?
Grid method multiplication is a written multiplication method that involves partitioning numbers into ones, tens, hundreds, etc. It is called the 'grid method' because the calculation is laid out into a grid, with one row and column for each place value.
How does grid method multiplication work?
When children first start using the grid method, they usually start with multiplying a one-digit number by a two-digit number.
The two-digit number is partitioned into tens and one, which will then each be multiplied by the multiplicand.
For example, for the calculation 27 x 4, the '27' is partitioned into 20 and 7. These are then both multiplied by the '4', adding the two products together to find the answer to the calculation (108):