# have you ever tried mental arithmethics?

@asherem2 (257)
Thailand
May 13, 2009 3:31am CST
My son last year have taken a module on mental arithmethics. I do believe it worth all the efforts and investments. My son can actually do math problems using the methods being taught in the course. My son said that this had been used by the Chinese since time immemorial..hmmn? I've seen him using an abacus - and actually he said, that's how you begin to learn mental math - learning the basics of abacus. if you know these things will be easier he said. and i believe that - whenever i got multiplying to do or adding - i just ask him, and without even looking at me give me the exact answer - even before i figure it out in my calculator...great job! mental arithmethics have you ever tried it?
1 person likes this
8 responses
• United States
14 May 09
Yes, I have tried it before. But I forgot what number I calculated... Basically, what happened is my brother told me how to calculate a light year. I remember doing the whole equation in my head, but it took me about an hour or so to come up with the answer. I do admit that my brain is kind of lazy, but I've worked it very hard before, too!
@Colmuc (707)
14 May 09
You are now getting into the "Divine Proportion" or "Golden Number" rule of body design, 1.61804, which is what our construction is based on. Finger joints, foot design, hand to forearm, head parts and overall body size relationships are covered by this. An absolutely fascinating subject.
@asherem2 (257)
• Thailand
14 May 09
hahahaha! that's what i call thinking in the 10th power. lol! imagine that - a light year? oh boy, and i guess, you have only used a a bit of your brain power huh? our brain can do so much! isn't wonderful? whoa! they said if we used 1/3 of our brain we will be genius? hmmnn..and i'm just wondering how many percent does other people were using? lol! By the way have you ever calculated the distance of your head to the floor and divide it by the distance of your belly button to the floor? guess what ratio? have fun! mental math rules!
@Sandra1952 (6047)
• Spain
13 May 09
I'm 56, and when I was at junior school in the 1950's, we had mental arithmetic excercises every day, along with spelling tests once a week, times tables and handwriting lessons. It's a great grounding in basic numeracy and literary skills, and it should be reintroduced. This is a skill that, once you grasp it, is there for life. I can still beat my husband on the calculator with a list of figures. If your child's school does not do this, this is something you can do with your children to set them up for life. And it gets them away from computer games for a while!
@smacksman (6053)
13 May 09
I agree completely.
@asherem2 (257)
• Thailand
14 May 09
great job! i guess, we need to get it back to the system huh? curriculum wise - it seems no longer a must but an electives to chose from. i guess, we're more blessed than this younger gens..we can calculate by rote. lol! i greatly agree with you! it will set them for life. May your tribes increase! let keep mental math alive!
@smacksman (6053)
13 May 09
I sent my son to a £3,500 a year public school (in the UK that means a private school - don't ask!) and at the end of it he came out not able to do mental arithmetic. Years later I went on the Net to see what was there for learning the times tables. There was nothing but poems, tables, tricks and expensive courses. So I put up a page for the way I learnt it - seven sevens are 49; seven eights are 56; and so on through the times tables. I urged the reader to team up with a friend and learn together 'parrot fashion' until they can remember the tables like they can remember their name or the days of the week. Calculators? Computers? Great bits of kit and very accurate. But how do you quickly check if the answer is realistic without mental arithmetic to help you? How do you know if you made a mistake putting the data in?
@asherem2 (257)
• Thailand
14 May 09
You've really smack it! lol! now you're talking! i guess, that's what we need to do go back to the basics. Youve done right! i've also done that to my son and guess what - he can recite through the tables without batting an eye...lol! i mean, he is way over me when i was his age... i'll share to him what you say: it ill greatly encouraged him to do better. thanks to you! may your tribes increase. long live mental math!
• South Korea
13 May 09
my son 5 year old is math lover.in kindergarten they learn how to used mental arithmetics, and still they are using some chinese style like abaccus.and it really works.now he knows how to used it.
@asherem2 (257)
• Thailand
14 May 09
wow! keep him at it. and it will also help you to take him away from computers. lol! youre doing the right thing for your son! keep it going! may your tribes increase, my dear! hehehe..!
@Colmuc (707)
13 May 09
I find it good that your son is calculating mentally. When I was in school mental arithmetic was very important. We had no calculators except the one in our head. In the UK at that time we had no decimal system for money or measurements. 12 pennies were 1 shilling. 20 shillings were 1 pound. 12 inches were 1 foot. 3 feet were 1 yard. 14 pounds were 1 stone. 8 stone were 1 hundredweight. 20 hundredweight were 1 ton. So if I went to the store and bought 6 pounds of potatoes at 1/9d per stone, 4 cakes at 3d each and 4 feet of cable at 1/6d per yard how much change did I get from a 10 shilling note? Today, almost 55 years after leaving school I can still calculate a lot in my head.
@asherem2 (257)
• Thailand
14 May 09
wooot! a walking calculator! how many do you think have that kind of prowess you have today? not much huh? it seems we're all becoming "extincts" - we became a kind of vintage something -when we do that people thought - "geniusly weird" lol! i beleive in using more of our brains, yet more often we let it be idle and it rust because of unused. im greatly encouraged by your example-i'll share that to my son - it will boost him up, thanks to you. i guess, there will be many expensive brains in the shelves for sale later on...expensive because they are "slightly used." lol! may your tribes increase!
@geniustiger (1694)
• Philippines
13 May 09
yes but using abacus i did not experienced it when i was young. but tho no abacus still have many sticks , stones, rubber bands available in our community. but still have the guts to learned more in mental arith metic coz our teachers those day are so strict and we must memorize everything thats why i knew the basics.
@asherem2 (257)
• Thailand
14 May 09
kids nowadays were totally dependent on calculators. they already forgotten the basics. quite sad isn't? my desire is for my kids to know it by heart so that it will help them through life. let's pass on to the next generation mental math. lol!
• Nepal
14 May 09
I think and believe that mental arithmetics is necessary for developing the mental strength in maths. Actually nowadays no one want to do it.
@dianmelydia (2269)
• Indonesia
14 May 09
I'm teaching elemantary students course as my part time job. I taught them mental arithmetics because i found their teacher on their school still taught them with conventional methods. It doesn't worth time and logic if they must do math with conventional methods, especially if they are on final exam which time limited for doing the exam. Mental arithmetics is a great teaching method for mathmatics. We will learn the fastest logic on math with this method. One of my pupil has problem with multiplication. But after i taught him mental arithmetics, he could finish multiplication problems without false. Have a nice day and happy mylotting.