ATMA MENTAL ARITMETIKA : PERKALIAN PULUHAN DENGAN SEMPOA.

Summary

In this educational video, Atma Mental Aritmatika teaches viewers how to efficiently multiply tens using mental arithmetic. The instructor demonstrates step-by-step methods to multiply numbers like 53 by 45 and 64 by 73, breaking down the multiplication into manageable parts. By focusing on multiplying the tens and ones separately, the video helps viewers improve their calculation speed and accuracy. The content encourages practice to enhance math skills and become proficient at mental calculations. Viewers are also motivated to continue learning and practicing to excel in mathematics.

Takeaways

• 😀 The video introduces mental arithmetic techniques, particularly focusing on multiplication using the abacus (sempoa).
• 😀 Viewers are encouraged to subscribe and comment before watching the video for a more interactive experience.
• 😀 The main focus is on multiplying tens by tens, an essential arithmetic skill.
• 😀 Example 1 (53 × 45): Break down the multiplication by first calculating 53 × 5, then 53 × 40.
• 😀 Example 1 (53 × 45): The final result is obtained by combining 265 (53 × 5) and 2120 (53 × 40) to get 2385.
• 😀 Example 2 (64 × 73): Similar steps are taken by first multiplying 64 × 3, then 64 × 70.
• 😀 Example 2 (64 × 73): The result after combining both parts is 4672.
• 😀 The importance of practicing multiplication problems regularly is emphasized to increase speed and accuracy.
• 😀 Viewers are encouraged to practice multiplication problems at home to become faster and more confident in arithmetic.
• 😀 The video ends with a friendly closing, thanking the viewers and wishing them success in learning.

Q & A

What is the main focus of the video?

The video focuses on teaching how to multiply tens with tens using mental arithmetic and a visual aid method called 'sempoa'.

What is 'sempoa' as mentioned in the video?

Sempoa is a traditional counting tool used to help children learn arithmetic by using beads to represent numbers, aiding in mental calculations.

What is the first example multiplication shown in the video?

The first example shown is 53 multiplied by 45, which is explained step-by-step by breaking the numbers into tens and ones.

How is the multiplication of 53 and 45 calculated in the video?

To calculate 53 x 45, first multiply 53 by 5 (the tens digit of 45) to get 265. Then multiply 53 by 4 (the tens digit of 45) to get 212. Finally, the results are combined to get 2385.

What is the second multiplication example in the video?

The second multiplication example is 64 multiplied by 73.

What is the first step in multiplying 64 by 73?

The first step is to multiply 64 by 3 (the ones digit of 73), which gives 192.

How is the multiplication of 64 and 73 further broken down?

After multiplying 64 by 3, the next step is to multiply 64 by 70 (the tens digit of 73). This involves calculating 64 x 7, resulting in 448, and then adjusting for the tens place.

What is the final answer for 64 x 73?

The final result of 64 x 73 is 4672, which is obtained after combining the partial results of 192 and 4480.

What does the speaker encourage viewers to do after watching the video?

The speaker encourages viewers to practice multiplication problems as much as possible to improve their speed and accuracy in mental arithmetic.

How does the speaker emphasize the importance of practice in learning arithmetic?

The speaker emphasizes that the more practice children get with multiplication, the faster and more accurate they will become in performing mental arithmetic, eventually becoming proficient in solving math problems without relying on written calculations.