HOW TO MULTIPLY ANY TWO DIGITS NUMBERS RANGING FROM 11 TO 20

This week, we’ll be considering how to multiply two digits numbers from 11 to 20. This trick makes multiplying numbers between 11 and 20 an extension of the times from 1 to 10. This trick will help you figure out the times' table from 11 to 20 by extending the times table up to 10. 

Can you multiply 12 by 14 easily? Problems up to 10 are often memorized when we learn the times' table up to 10.

There are four main steps. First, add the unit’s digits of the second number to the first number. second, multiply the result by 10. third, multiply the unit’s digits of both numbers. And finally, add the results from the second and third steps.    

Let’s do an example of 12 x14.the number 14 has the unit’s digits of 4. We add the unit’s digit 4 to the number 12 to get 16. Then we multiply that by 10 to get 160. Third, we multiply the unit’s digits of 2 and 4 to get 8. finally, we add 160 and 8 to get 168.

Let’s do another example of 15 by 18. We add 8 to 15 to get 23, and then we multiply that by 10 to get 230. We then multiply the unit’s digits of 5 and 8 to get 40. Adding that to 230 get’s an answer of 270.

Notice we would get the same answer even if we did 18 times 15. In this problem, we would add 5 to 18 to get 23, which e multiply by 10 to get 230 then we multiply the unit’s digits of 8 and 5to get 40. Adding 230 and 40 once again results in the answer of 270.

EXERCISE

CLICK HERETO ATTEMPT SOME SIMPLE QUESTIONS