As numbers become bigger written methods are introduced to help organise calculations: 600 ‘Long multiplication’: (20x30) 952 Example 1: 36 x 4 = 36 Here the numbers are X 4 partitioned and 24 (6X4) multiplied separately 120 (30X4) before being added at the 144 end. This shows the children where the Example 2: 34 x 28 + = answers are coming from. It can work for 2 digit 34 numbers X single digits X 28 and 2 digit numbers X 32 (4X8) an- other 2 digit number 240 (30X8) 80 (20X4)
As numbers become bigger written methods are introduced to help organise calculations: ‘Long multiplication’: Example 1: 36 x 4 = 36 X 4 24 (6X4) 120 (30X4) 144 Example 2: 34 x 28 + = 34 X 28 32 (4X8) 240 (30X8) 80 (20X4) 600 (20x30) 952 Here the numbers are partitioned and multiplied separately before being added at the end. This shows the children where the answers are coming from. It can work for 2 digit numbers X single digits and 2 digit numbers X an- other 2 digit number
Tregolls-maths-guide-for-parents.docx