Addition, Subtraction, Multiplication and Division - Multiply 4-digits by 2-digits - Presentation

In a comprehensive lesson on multiplying 4-digit numbers by 2-digit numbers, students are introduced to the concept of multiplying integers. The lesson begins with a discussion on what an integer is and how to multiply them. Students then move on to the column multiplication method, where they practice multiplying 4-digit numbers by 2-digit numbers through a series of steps. The process includes partitioning the 2-digit number, multiplying by each digit separately, using a placeholder zero when necessary, and then adding the results using column addition. A key tip provided is to remember to carry forward as you multiply and add on the exchanges.

Further activities challenge students to apply their multiplication skills in practical scenarios, such as calculating the total number of chocolate chips used in a batch of cookies, based on the number of cookies made and chips per cookie. This real-world application helps to cement their understanding of multiplication in everyday contexts. Additionally, students work on identifying important considerations when multiplying by the tens number and explore the use of inverse operations to solve problems. The lesson also includes reasoning tasks where students determine the truth of multiplication statements and arrange digits to create the largest product, encouraging critical thinking and problem-solving skills.