Max Maths, Year 3, Learn together, Multiplying by teen numbers (1)

In a Year 3 mathematics lesson, children are introduced to the concept of multiplying by teen numbers through a relatable and engaging context—chocolates in a box. The lesson begins with a simple question that captures the students' interest: If there are 14 chocolates in one box, how many chocolates would there be in two boxes? This practical example provides a concrete basis for the abstract mathematical operation of multiplication.

To illustrate the process, counting blocks are used as a visual aid, allowing the children to see the numbers in a tangible form. The lesson then breaks down the multiplication into more manageable parts by grouping the tens and the ones separately. The equation 2 x 14 is expanded into 14 + 14, which is further broken down into 10 + 10 + 4 + 4. This step-by-step addition helps students understand that multiplication is essentially repeated addition. By combining the tens to make 20 and the ones to make 8, the children can easily see that the total number of chocolates in two boxes is 28. This method not only reinforces the concept of multiplication but also strengthens the students' addition skills, particularly when dealing with two-digit numbers.