Multiplication 3: 10,11,12 times tables | Multiplication and division | Arithmetic | Khan Academy

TL;DR

Learn how to quickly and easily calculate multiplication tables for numbers 10 through 12.

Transcript

In the last video we went over the multiplication tables for 1 through 9 and I ran out of time, and actually, it was a good thing because 1 through 9 are kind of the core multiplication tables. And you'll see that if you know all your multiplication tables from 1 to 9, so you know any number between 1 and 9 times any other number between 1 and 9, y... Read More

Key Insights

• 🚰 Numbers 10, 11, and 12 have distinct patterns in their multiplication tables.
• ⌛ Adding a zero to a number gives the result for the 10 times tables.
• #️⃣ The 11 times tables have a repeating pattern for single-digit numbers and require adding the number to the previous product for larger numbers.
• ⌛ Calculating the 12 times tables involves increasing by 12 for each subsequent number.
• 🚰 Memorizing multiplication tables is essential for efficient mental calculations and mathematical fluency.
• 🚰 Practicing multiplication tables through flashcards or online resources can improve proficiency.
• ✖️ Understanding the patterns in multiplication tables can be helpful in solving more complex multiplication problems.

Questions & Answers

Q: How can I quickly calculate multiplication tables for numbers 10 through 12?

For numbers 10 and above, simply add a zero to the number to get the result. For example, 10 times 5 is 50, 10 times 6 is 60, and so on.

Q: How do I calculate 11 times tables?

For single-digit numbers, the result is obtained by repeating the number twice (e.g., 11 times 4 is 44, 11 times 5 is 55). For numbers larger than 9, you add 11 to the previous product (e.g., 11 times 10 is 110, 11 times 11 is 121).

Q: How can I calculate the 12 times tables?

To calculate the 12 times tables, increase by 12 for each subsequent number (e.g., 12 times 3 is 36, 12 times 4 is 48). Remembering multiplication patterns and using previous results can also help (e.g., 12 times 10 is 120, 12 times 11 is 132).

Q: Why is it important to memorize multiplication tables?

Memorizing multiplication tables allows for quicker mental calculations and improves overall mathematical fluency. It helps in solving more complex multiplication problems and builds a strong foundation for further mathematical concepts.

Summary & Key Takeaways

• The video demonstrates how to calculate the multiplication tables for numbers 10 through 12.

• By understanding the patterns and adding a zero to the number, you can quickly solve multiplication problems.

• Practice and memorization of multiplication tables are important for efficient mental calculations.