DearDemi

记得很久以前看过一本书，书中一个专家说中文是更适合数学的语言，因为发音简单，所以华语环境的孩子会数数的平均年龄比其他语言的孩子早3-6个月。
以我个人的体会，教孩子用华语背乘法表很简单，但孩子会背了以后转换成英语也很顺。

飞雪迎春到

DearDemi 发表于 16-5-2011 12:15
记得很久以前看过一本书，书中一个专家说中文是更适合数学的语言，因为发音简单，所以华语环境的孩子会数数 ...

谢谢,学习了.

jjrchome

顶一下老贴，分享一些新发现：

欧美的的9x9乘法表：


欧美的的12X12乘法表：



记忆方法：

• Multiply 5 and 10 with a simple pattern. Just remember that all odd numbers  multiplied by 5 end in 5: 5 x 1 = 5, 5 x 3 = 15, 5 x 5 = 25 and so on. An     even number multiplied by 5 ends in 0: 5 x 2 = 10, 5 x 4 = 20, 5 x 6 = 30  and so on. To multiply by 10 just add a 0 to the number: 10 x 2 = 20, 10 x3 = 30 and so on.
• Remember this tip to make quick work of multiplication by 4s: 4 x 1 = 4, 4 x 2 = 8,   4 x 3 = 12, 4 x 4 = 16 and 4 x 5 = 20. After that, the pattern repeats itself, so 4 x 6 = 24, 4 x 7 = 28 and so on.
• Recognize the pattern that the number 6 creates. Multiply an even number by 6 and  both end in the same digit: 6 x 2 = 12, 6 x 4 = 24 and so on. This does not apply to odd numbers.
• Memorize  this rule for multiplying by 9. The number in the 10s place goes up, and the number in the ones place goes down: 9 x 1 = 9, 9 x 2 = 18, 9 x 3 = 27,  9 x 4 = 36 and so on.
• Learn how the multiplier by 11 is repeated twice up to 9: 11 x 1 = 11, 11 x 2 = 22, 11 x 3 = 33 and so on. To multiply 11 by any number of two or more digits from 11 x 11 onwards, add two digits of the number, starting from the right, and put it between the first and last digits of the number, starting from the left. For example, 11 x 17 = 187 (1 + 7 = 8; insert it    between the 1 and the 7 to get 187). 11 x 2,312 = 25,432 ( 2 + 1 = 3; 1 + 3 = 4; 3 + 2 = 5; the first and last digits are 2; so 25,432). If one of  the pairs is greater than 10, carry over the one to the number to the  left. 11 x 59 = 649 (5 + 9 =14; place the 4 between the 5 and 9 and add the one to the 5 for 649.
• Simplify multiplying by 12 by splitting 12 into 10 and 2. Multiply the number by     10, and then multiply it by 2. Add the two answers. For example: 8 x 12 =  (8 x 10) + (8 x 2) = 96.
  

印度和韩国采用的是19X19乘法表。韩国是死记硬背，印度则是采用“印度乘法”：

   14×13 = 182

(1) 14+3＝17
(2) 17×10＝170
(3) 4×3＝12
(4) 170+12＝182

最狠的是：

台湾同胞的算法：

@3  X @2 = ?

第一步：

先把被乘數(@3)跟乘數的個位數(2)加起來

@3 + 2 = @5

第二步：

再把被乘數的個位數(3)乘以乘數的個位數(2)

3 X 2= 6

第三步：

然後把第一步的答案乘以@0(→也就是說後面加個0 )之後再加上第二步的答案就行了

13x12=15 X 10 + 6 = 156

23x22=25 X 20 + 6 = 506

33x32=35 X 30 + 6 = 1056

43x42=45 X 40 + 6 = 1806

53x52=55 X 50 + 6 = 2756

93x92=95 X 90 + 6 = 8556

roger

125+125=250
用中文和英文都念一遍，就知道用那个好学了。。