Immediately answer the product of the number 2 - 3 digits super

These fast and standard calculation tips will help you a lot when you don't have a computer!

If someone else quickly calculates the multiplication of two two-digit numbers, such as 23 x 12 without allowing you to use the computer, you will not hesitate to take out the pen and set the calculation in a vertical line as well. learn from childhood?

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This calculation can take you 1-2 minutes, but with the Japanese mental math tips below, you will not need to put a pen and take too long to multiply the two-digit number. Make sure you enjoy it!

Way 1

Example: You need to find the result of the 23 x 12 multiplication calculation , follow these steps!

Step 1: Show two-digit numbers by straight lines.

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Step 2: Count the intersection points between the straight lines and record the results.

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The number of intersection points in the bottom right corner will be the result of the unit row.

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The number of intersection points in the top left corner is the result of hundreds.

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And the total number of intersections in the other two corners will be the last " unknown " you need to find.

If you're not sure, watch the video below!


The video shows how to calculate the number of 2.3-digit numbers.

The result of " scooping up " when you set a vertical calculation!

What if I want to multiply a 3-digit number with a 2-digit number ? Please do the same!

After watching this video, you are no longer afraid of " any calculation "!

Method 2

If you see a straight line that will make you " confused ", then come to this " extreme " way.

Step 1: Draw a square with the number of columns and lines corresponding to the number you have to perform multiplication. Then remember to cross out the boxes!

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Step 2 : Perform multiplication in turn of each number in hundreds, tens, units in the first factor with each 2nd factor.

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Step 3: Now you just need to add the numbers in the diagonal row to get the result!

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Method 3:

Want to multiply two-digit numbers between 10-20, for example: 13 x 14 - we just need to follow the steps as follows:

Step 1: Get the ones' place digits of the two numbers multiplied.

4 x 3 = 12

Step 2: Take a number plus the ones' place digit of the remaining number, get an extra number 0 after that.

(14 + 3) and follow 0 behind that = 170

Step 3 : Adding the results of the two steps above will find the final answer.

12 + 170 = 182.

Example: 14 x 13 = 4 x 3 + (14 + 3) 0 = 12 + 170 = 182

Very fast and not even need to calculate drafts, right? Now you can quickly calculate the calculations. Let's test you around calculations and see who gets the answer faster!