Max Maths, Year 4, Learn together, Multiplying 2-digit numbers with regrouping (3)

Max Maths Year 4 provides a clear and interactive approach to multiplying 2-digit numbers, incorporating regrouping techniques to aid understanding. In Step 2 of the process, students are taught to regroup numbers effectively. For example, when multiplying 25 by 3, we start with the ones. Multiplying 5 ones by 3 gives us 15 ones. This number is then regrouped into 1 ten and 5 ones. The 5 ones are written in the Ones column, and the 1 ten is carried over to the Tens column, preparing for the next step of the multiplication process.

Proceeding to Step 3, the focus shifts to multiplying the tens. The 2 tens in the number 25 are multiplied by 3, resulting in 6 tens. However, we must remember to include the 1 ten that was carried over from the previous step. By adding this 1 ten to the 6 tens, we obtain a total of 7 tens. Writing this down gives us the complete answer: 25 multiplied by 3 equals 75. This method not only simplifies the multiplication process but also demonstrates the practical application of regrouping in arithmetic. An example is given to illustrate the real-world use of this multiplication, stating that if there are 3 containers with 25 pencils each, there would be a total of 75 pencils in all the containers combined.