夜深了,森林里传出了一阵又一阵叽叽喳喳的声音,原来是机灵狗和笨笨熊在讨论数学问题。“计算小数加减法,只要把相加减的两个数的末位对齐就可以了。”机灵狗瞪着双眼,提高嗓门,大声说着。笨笨熊挪了挪身子,伸了伸腰,涨红着小脸,轻声地说:“机灵狗,你的想法不对啊!”“怎么不对呢?计算整数加减法,不也是相加减的两个数的末位 Late at night, there came a burst of twittering in the forest, turning out to be smart dogs and stupid bears discussing math problems. ”Calculate the decimal addition and subtraction, as long as the last two digits of the addition and subtraction alignment on it. “ Clever dog staring at his eyes, raising his voice, loudly said. Stupid bear moved north face, stretch, red face, whispered: ”smart dog, your idea is wrong! “ ”Wrong? Calculate the integer addition and subtraction, not also phase Addition and subtraction of the last two digits