Math - Long Multiplication

TL;DR

Learn how to do long multiplication step-by-step, using examples ranging from easy to challenging.

Transcript

in this video we're going to focus on long multiplication it's one of those math techniques that you've learned in school let's start with a simple example what is 39 times 8 but what we need to do is multiply eight by nine first eight times nine is seventy two so we're going to write the two and then carry over the seven next we need to multiply e... Read More

Key Insights

• 👨‍🏫 Long multiplication is a foundational math technique taught in schools.
• #️⃣ It involves multiplying each digit of one number by each digit of the other number.
• 🪘 Carrying over and adding the results are critical steps in long multiplication.
• #️⃣ Long multiplication can be used for both whole numbers and decimal numbers.
• 🪘 Practice with various examples helps to strengthen understanding and proficiency in long multiplication.
• ✖️ The step-by-step process simplifies complex multiplication problems.
• 🌍 Long multiplication is essential for solving real-world math problems and advanced mathematical concepts.

Questions & Answers

Q: How do you perform long multiplication?

Long multiplication involves multiplying each digit of one number by each digit of the other number and adding the results together.

Q: How do you know when to carry over in long multiplication?

When multiplying two numbers, if the result of a multiplication is two digits, you write the units digit and carry over the tens digit to the next column.

Q: Can you explain the process of long multiplication with an example?

Certainly. Let's take the example of multiplying 46 by 27, where we multiply each digit and carry over if necessary, and then add the results to get the final answer.

Q: Does long multiplication only apply to whole numbers?

No, long multiplication can also be applied to decimal numbers by including the appropriate number of decimal places in the calculation.

Summary & Key Takeaways

• The video explains the process of long multiplication using clear and concise examples.

• It demonstrates multiplying two-digit numbers by single-digit numbers and two-digit numbers by two-digit numbers.

• The step-by-step approach helps viewers understand the process of carrying over and adding the results.