第三十七章 你觉不觉得你们挺配(2 / 2)

“1是什么?是正数,-1是什么?是负数!所以(-1)×(-1)×(-1)=多少?”

“等于1啊,负负得正。”

秦竹南理直气壮的道。

“三个-1,你数了吗?有几个负号?剩下的那个负号是丢到你的智商上面去了吗?”

“额····那,等于-1?”

“不然呢?”

许庭知反问道,火气蹭蹭蹭的往上涨,果然是不能教孩子学习!

“(-1)+(-1)呢,等多少?”

“我知道,等于1!”

这回对了吧,两个负号!

“这是加法,你是会法术吗?手动帮它们把负号消除了?敢问阁下师承何处,法力如此高强?”

许庭知面无表情。

一个简单的加减乘除,教了半天愣是学不会,圣人都不能没有脾气。

“我错了。”

秦竹南别的没有,认错的态度一流。

“我错了是三个字,一个字代表一个负号,三个负号相乘最后得出的结果是负还是正?”

“负,负的吧。”

“三个负号相加呢,得出的结果是负是正?”

“负!我知道了,认错是没有用的,努力才有用!”

许庭知连嘲讽人的手段都能层出不穷,秦竹南彻底怕了,许知青太难缠了,呜呜呜呜。

不过,经过一个下午的教学,秦竹南总算分清了负数和正数的加减法,能自己总结了。

“乘除法的话,单个负号最后的结果就是负,双个负号的话就是正!加减法的话,是负就是负,是正就是正,不会变!”

他口号喊的倒是响亮。

许庭知随口一问。

“那(-1)+(-3)+7等多少?”

“等于-11!”

许庭知:····

“介意我让你姐换个弟弟吗?”

“啊啊啊,不是不是,我说快了,是4对不对?不对不对,好像是3?”

秦竹南又乱了。

“你可以回家问问你姐,是哪个数挨的鞭子比较疼。”

秦竹南:(﹏)

晚上,秦竹南拎着一个加大号的篮子过来了,他弱弱的道。

“许知青,我姐做了你要的麻辣兔肉,闻起来很香,吃起来更香。”

“嗯。”

许庭知一脸的冷淡。

“我偷偷给你夹了好多肉!”

“哦。”

“那个,我家还有一只兔子,明天我姐做的时候,我再偷偷给你送!”

秦竹南悄咪咪的道,为了讨好老师,他把自己的姐姐都供出来了。

许庭知的耳朵动了动,嗯?昨天秦竹西抓的兔子原来是还没做?他莫名的舒心了。

“嗯,回去吧,没事自己多看看课本。”

他的语气和缓了下来。

“好,我知道了,许知青,我以后一定会更认真学习的!”

秦竹南保证道,终于不生气了,他要是把许知青给气走了,他姐肯定要收拾他了。

他把篮子放下,一溜烟跑走了,有一说一,他姐做的兔子真的超香,口水要流出来了,他也要回去吃!

“不许动,你的在这,桌上的是我的。”

秦竹西端出一碗没什么辣椒的兔肉给他。

“你不能吃太辣。”

“啊,好吧。”

他答应的很干脆,虽然有点不高兴但是并不敢反驳。

“答应的这么快?我怎么觉得你有点心虚?”

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