Tricks for Multiplying Numbers Between 11 and 19

 Example
 14 x18

 Step 1
 Add the largest number between the two with the rightmost digit of the other number
 18 + 4 = 22

 Step 2
 Add zero behind the number obtained in number 1
 22 -> 220

 Step 3
 Multiply the rightmost digit of the two numbers then add the number obtained in step 2
 4 x 8 = 32
 220 + 32 = 252



https://img.esteem.ws/yyw9n1elhp.jpg





 Multiplication Tricks with Numbers 15

 Example
 36 x 15

 Step 1
 Multiply 36 by number 10
 36 x 10 = 360

 Step 2
 Divide the results of step 1 with 2
 360/2 = 180

 Step 3
 Add the results in step 1 and step 2
 360 + 180 = 540



https://img.esteem.ws/vhjzkd7smp.jpg




 [Source](https://rumushitung.com/2014/10/08/trik-perkalian-anggih-dan-mudah/)


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