advertisement

Multiplication Grid Method To teach multiplication, one of the methods we use is the grid method. We partition the numbers up into hundreds, tens and units (or ones) and then use a grid to multiply each of the separate parts. It sounds more complicated than it is! there are 4 digits here which means you e.g. 23 x 15 will need to do 4 multiplications 10 5 20 (20 x 10) 3 (3 x 10) 200 30 (20 x 5) (3 x 5) 100 15 Now just add all the numbers in the grid! so 23 x 15 = 200 + 100 + 30 + 15 = 345 For larger numbers just use a bigger grid! Multiplying by 10, 100 or 1000 Multiplying by 4 The digits move 1, 2 or 3 places Double and double again to the left 4.56 x 10 = 45.6 13 x 4 4.56 x 100 = 456 double 13 = 26 4.56 x 1000 = 4560 double 26 = 52