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第十章、新式算法

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是勋闻言吓了一大跳,就觉得后背上直冒凉气,赶紧转过头来分辩:“非也,乃说他人家事。吾自有贤妻,可比无盐、孟光……”话出口就觉得不妙,无盐那可是著名的丑女啊……

不过好在这年月“无盐”似乎还并没有成为丑女的代名词,史书仅传其劝谏齐王,乃封为后事,“刻画无盐,唐突西施”云云,还得几十上百年后才得出现。嗯,其实是勋完全不必要那么紧张。这话曹淼压根儿就有听没有懂她哪儿知道无盐、孟光都是ho啊?!

看到曹淼进来。关靖便即拱手施礼。口称“曹夫人”。曹淼也知道关士起在是勋心目中的地位,非普通门客可比也,赶紧还礼,问说宵夜准备好了,关先生要不要与夫婿共进呢?关靖笑一笑:“吾老矣,岂尚能饭?日进二餐足矣。”便即起身告辞。

曹淼也没有听懂关靖的话,还问是勋:“岂老者不能饭否?”是勋心说你当人人都跟你爹似的,都五十多了还每餐斗米。没有廉颇的本事,却有廉颇的饭量?也不作答,却问曹淼:“夜食何在?”你嘴里说宵夜好了,结果空着手进来是几个意思?

曹淼说厨下这就会送过来,你别着急,随即从袖中取出一册来,递给是勋:“家中此月账务,夫君过目。”

其实是府的财政分成两块,小头是管氏父女管着,大头归管家鱼他。但曹淼自从被是勋逼得多识了些字,读过几本书以后。就特意每月问鱼他索要账目来看,等她先核对过了再交给是勋因为觉得只有这样才算尽了大妇之责,也才能体现大妇的权威。

这年月的记账方法比较简单,但正唯其简单,所以更显繁杂、混乱,就曹淼的天赋,一个人跟案上摆弄半天算筹,都未必能算清一笔账。是勋瞧着起急,干脆教给她阿拉伯数字和简单的算数公式要说高级点儿的,就连是勋本人都早就还给前一世的数学老师了。

没想到曹淼学得挺快,完了就以此去要求鱼他。鱼他瞧见那些曲里拐弯的阿拉伯数字头都大了,先极口恭维主人这学自异域的计数法实在神妙,然后提醒曹淼,说主母既然不喜欢算筹,咱可以学珠算呀。

于是曹淼捧了一具珠算又来找是勋,是勋一瞧,这特么是虾米玩意儿?原来当时珠算初创,又叫算板,是在木板上刻出几条长槽来,内嵌活珠,但跟后世的算盘不同,槽分三段,上下两段各嵌一珠,中段则嵌五珠。是勋接过来试了试,实在不易拨动,因此干脆画了幅后世算盘的图形,命木工制成来用。

他前一世的小时候确实是学过珠算的,可是什么“一下五去四”、“三去七进一”的早就忘得精光溜溜啦,拿到新式算盘后拨拉来拨拉去,总是回想不起来。鱼他倒是瞧着这新式算盘挺方便,不但给请了去,还自作主张制作贩卖,但他从此算得了账以后,就必须先请人对照图谱,给改抄成阿拉伯数字,再呈给曹淼,曹淼以算数公式核对过后,再交给是勋。

是勋原本是不怎么查账的瞧着眼晕自从能够拿到阿拉伯数字的账本以后,倒是轻松了许多,于是每月必查。至于鱼他是否因此而暗中记恨曹淼,那就谁都猜不到啦。

其实是勋这套阿拉伯数字和算数公式,鱼他虽然望而却步,学成者却并非仅仅曹淼一人而已,还包括了诸葛孔明。想当年孔明于是勋门下研究抛石机,经常见着老师背过身去拿枝笔点点画画的,也不用算筹,也不用珠算,普通加减乘除还算得挺快,心知必有秘法。他是个勤奋好学的,便找个机会请教是勋,说我知道筹算非经学正道也,但日常也总能用得上,先生既有秘法,何不教我?您不是打算光把弟子教成个经学家吧?

是勋说你别瞧我算得快,这玩意儿还真未必好学“此西域所传阿……”一琢磨这年月还压根儿没有阿拉伯呢,若循其本源说是印度数字呢?印度终究距离不远,后世之人怕会指摘自己扯淡,干脆“此大秦数字也,书法与中国字大为不同。”诸葛亮说没关系,弟子愿学。

于是是勋就教了给诸葛亮啦,谁想到诸葛孔明真高才也,一学就会这年月篆书仍然小范围地流行,握毛笔写曲道还真难不住他而且计算速度要超过是勋一倍,准确率同样超过一倍……

“真妙法也,有何难哉?”诸葛亮是无心之言,是勋却听得有点儿脸上发烧。

ps:本月最后一天了,再闲着也就废了,不如投给本书吧,谢谢!

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