Hey ...u r son is in 4th...Its Ok...Dont listen to others...he should know.. these tables...It'll be much useful to him and u know its results are hidden...I mean sometimes he would do calcs so fast that u would not even wonder that he would have done that becoz of tabls.....
also multiplication tabls are much useful when u want to calculate percentage...
I bet...u take a survey ur self....How many students(take in 12 th std) can find percentages orally in just few seconds...for eg. ask them...1) what is 85% of 1600 and
2) what is 10% of 1600..
even
3)What is the % of 50 out of 1600 etc...
Its an very easy task and very usefull in day to day life. And if ur son will know this I think it'll be great..
Also a simple ques...****How much time every day do u spend on ur PC. Reply in %...One who doesn't knows tables would think a while ..But its simple just calc total hours u spend on ur PC and divide it by 24(if u know its table.) even slight approx. would work if u take 25 instead and adjust in the result..We'll U would be understanding what i mean..Plz dont take it lightly.
U know in exams like..12th Board and Aieee and IITs every second is important and every calculation even the minute one taking time of miniseconds affect our results greatly...
which decide our careers...Aakhir BOOND BOOND SE BANTA HAI SAAGAR
Sorry for the lecture.