Cara Perkalian Susun: Menghitung Hasil Perkalian dengan Mudah

>Hello Sohib EditorOnline! In this article, we will discuss “cara perkalian susun” or how to multiply numbers quickly and easily. This technique is useful for students, teachers, and anyone who needs to calculate quickly. We will explore the steps involved and provide examples to help you understand this method better.

What is Cara Perkalian Susun?

Cara perkalian susun is a multiplication technique that involves arranging numbers in a specific way to simplify the calculation process. This method is commonly used in Indonesian schools and is taught to students as a way to help them with mental math. This technique is especially helpful when multiplying large numbers.

Arranging the Numbers

Before we begin to learn how to multiply using cara perkalian susun, we need to understand how to arrange the numbers. The first step is to write down the numbers we want to multiply next to each other, from left to right. For example:

Number 1	Number 2
1234	5678

Next, we will draw a diagonal line from the top left corner to the bottom right corner of the square formed by the numbers. This line separates the numbers into two parts:

		5	6	7	8
	1	1	2	3	4
4	4	4	8	12	16
3	3	3	6	9	12
2	2	2	4	6	8
1	1	1	2	3	4

Now, we will multiply the numbers in each diagonal row from right to left, and then add the products together. For our example, we get:

		5	6	7	8
	1	1	2	3	4
4	4	4	8	12	16	= 1,116
3	3	3	6	9	12	= 360
2	2	2	4	6	8	= 140
1	1	1	2	3	4	= 10
						= 1,626

And that’s it! The answer to our multiplication problem is 1,626. You can see that this method is much faster than using standard multiplication.

When to Use Cara Perkalian Susun

Cara perkalian susun is particularly helpful when you need to multiply large numbers or when you need to make quick calculations. It is also useful when you don’t have a calculator or when you want to improve your mental math skills.

Example Questions

Let’s look at some example questions to see how cara perkalian susun works:

Example 1

What is the product of 543 and 211?

We begin by writing down the two numbers next to each other:

Number 1	Number 2
543	211

Next, we draw the diagonal line:

		2	1	1
	5	5	4	3
4	4	4	2	1
3	3	3	1	0
2	2	2	1	0
1	1	1	0	0

Then, we multiply and add the numbers:

		2	1	1
	5	5	4	3
4	4	4	2	1	= 844
3	3	3	1	0	= 93
2	2	2	1	0	= 42
1	1	1	0	0	= 10
					= 114,573

So, the product of 543 and 211 is 114,573.

Example 2

What is 9876 multiplied by 5432?

We start by writing down the numbers:

Number 1	Number 2
9876	5432

Then, we draw the diagonal line:

		5	4	3	2
	9	9	8	7	6
8	8	8	7	6	4	= 8,497,632
7	7	7	6	5	4	= 7,001,032
6	6	6	5	4	3	= 5,333,392
5	5	5	4	3	2	= 4,271,160
						= 53,722,216

Therefore, the product of 9876 and 5432 is 53,722,216.

FAQ

What are the benefits of using cara perkalian susun?

Cara perkalian susun is a very fast and effective way to multiply numbers. It can be particularly helpful when you need to multiply large numbers or when you want to improve your mental math skills. It is also a useful technique to know when you don’t have access to a calculator.

Can I use cara perkalian susun for division?

No, cara perkalian susun is only for multiplication. However, there are other mental math techniques that you can use for division, such as “bagi dalam” or splitting the number into smaller parts and dividing each part separately.

Is cara perkalian susun difficult to learn?

Cara perkalian susun is relatively easy to learn, and it can be a fun and useful mental math technique to have in your toolbox. With practice, you can become very proficient at using this method and impress your friends and colleagues with your quick calculations!

How can I practice cara perkalian susun?

You can practice cara perkalian susun by writing down two numbers and practicing the technique. You can also use online resources or worksheets to practice. The more you practice, the more comfortable you will become with the technique, and the faster you will be able to calculate.

What other mental math techniques should I know?

There are many mental math techniques that can be useful for different types of calculations. Some other common techniques include “bagi dalam” for division, “pembagian dua angka” or multiplying by two and dividing by two, and “perkalian 11” or multiplying by 11. Learning these techniques can help you become more efficient and confident in your math skills.

Conclusion

In conclusion, cara perkalian susun is a valuable technique for anyone who needs to multiply numbers quickly and easily. This method involves arranging the numbers in a specific way and then multiplying each diagonal row and adding the products together. With practice, you can become proficient at using this technique and impress your friends and colleagues with your mental math skills. So, give cara perkalian susun a try today!

Cara Perkalian Susun: Menghitung Hasil Perkalian dengan Mudah