Max Maths, Year 4, Learn together, Multiplying 2-digit numbers with regrouping (4)

In Max Maths for Year 4, students are introduced to the concept of multiplying 2-digit numbers using the column method with regrouping. The example provided demonstrates how to find the product of 18 and 6. To begin, students are instructed to write the numbers in columns, placing the larger number, which is 18, at the top. The process starts with multiplying the ones, so the digit 8 (from the number 18) is multiplied by 6, resulting in 48 ones.

Following the initial multiplication, the next step involves regrouping the 48 ones into 4 tens and 8 ones. The 8 ones are written in the Ones column, while the 4 tens are carried over to the Tens column. The third step is to multiply the tens, which in this case is 1 ten from the number 18. This 1 ten multiplied by 6 gives us 6 tens. Then, the 4 tens that were carried over are added to these 6 tens, giving a total of 10 tens. By combining the results of these steps, it is determined that the product of 18 and 6 is 108. This methodical approach helps students understand the process of multiplication with regrouping in a clear and structured way.