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- Learnin Mathematics with the ABACUS Activity-book part 01
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- Learnin Mathematics with the ABACUS Activity-book part 02
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- Learnin Mathematics with the ABACUS Activity-book part3
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- Learnin Mathematics with the ABACUS Activity-book part4
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- Learnin Mathematics with the ABACUS Activity-book part 5
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- Learnin Mathematics with the ABACUS Activity-book part 7
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- Learnin Mathematics with the ABACUS Activity-book part 8
sufa
- Algorithm(算法)一词本身就十分有趣。初看起来，这个词好像是某人打算要写 “Logarithm”(对数)一词但却把头四个字母写的前后颠倒了。这个词一直到1957年之前在Webster s New World Dictionary(《韦氏新世界词典》)中还未出现，我们只能找到带有它的古代涵义的较老形式的“Algorism”(算术)，指的是用阿拉伯数字进行算术运算的过程。在中世纪时，珠算家用算盘进行计算，而算术家用算术进行计算。中世纪之后，对这个词的起源已经拿不准了，早期的语言学家试图推断它