Multiplication and Division - Multiply 2-digits by 1-digit – No exchanging - Presentation

The lesson plan focuses on reinforcing the multiplication of two-digit numbers by one-digit numbers without the need for exchanging. It begins by encouraging students to consider how partitioning can aid in solving these calculations. The initial activity uses Base 10 blocks to visually represent and calculate multiplications such as 21 times 4 and 33 times 3. This concrete approach helps students understand the process by breaking down numbers into tens and ones, making it easier to visualize and solve the multiplication problems. For example, the lesson poses a real-world question about counting coloured balls on snooker tables or gummy bears in sweet jars to contextualize the multiplication for the students.

Further activities guide students to apply the same method to other two-digit by one-digit multiplications, reinforcing the concept through repetition and varied examples. The lesson also explores the connection between multiplication and addition, showing how repeated addition relates to the multiplication of numbers. The use of place value counters in the activities helps students to match calculations with visual representations, bridging the gap between concrete and abstract understanding. The lesson concludes with reasoning tasks where students are prompted to identify and correct mistakes in sample calculations, fostering a deeper comprehension of the multiplication process. Discussion prompts encourage reflection on how the skills learned relate to addition and the benefits of partitioning and visual methods in understanding multiplication.