1.看,这些大数含有三级,你会读吗?这些数有什么特点?你能将它们改写成用“亿”作单位的数吗?对于学生举得例子中整亿的数,老师放手让他们自己改写(比较简单),改写后,说一说怎样改写的,应注意什么?
2.不是整亿的数省略亿后面的尾数求近似数,老师也是给学生充足的空间时间,自己尝试做一做。汇报交流时,重点强调,省略亿位后面的尾数关键要看哪一位上的数是否满五?
总之,学生自己能学会的知识,老师绝不包办代替,给学生留有空间,鼓励他们大胆尝试,利用已有的知识和学习方法自主探索,解决新的问题,提高数学能力。
正当葡萄熟了的`时候,一只狐狸偷偷地溜进了葡萄园。葡萄架上高高地挂着亮晶晶的、熟透了的葡萄,显得十分诱人。他跳了好几跳,蹦了好几蹦,想吃到这甘美的葡萄,但是他的企图全落空了,走开的时候,他自言自语说:"得了!这有什么!这葡萄是酸的。"
Leopard 猎豹
versatile 多方面的
variegated 多彩的
When a lion was asleep, a little mouse began running up and down beside him. This soon wakened the lion. He was very angry, and caught the mouse in his paws.
"Forgive me, please." cried the little mouse. "I may be able to help you someday." The lion was tickled at these words.
He thought, "How could this little mouse help me?" However he lifted up his paws and let him go.
A few days later, the lion was caught in a trap.
The hunters wanted to take him alive to the king, so they tied him to a tree, and went away to look for a wagon.
Just then the little mouse passed by, and saw the sad lion.
He went up to him, and soon gnawed away the ropes. "Was I not right?" asked the little mouse.
狮子与报恩的老鼠
●狮子睡着了,有只老鼠在他的周围爬上爬下,很快吵醒了狮子,狮子很生气,一把抓住了老鼠。
●“饶了我吧,”老鼠请求说,“也许有一天我能帮上你的忙呢。”狮子觉得很好笑,他想:“这只小老鼠怎么能帮上我的忙?”但他还是抬起爪子放他走了。
●不久,狮子被陷阱困住了。猎人们想将活狮子献给国王,就把他捆在一棵大树上,然后去找马车。
●这时,老鼠路过这里,看到了绝望中的狮子。他走过去,很快啃断了绳索,说:“我虽小,可是我也能帮上你的忙。”
寓意: 有些朋友也许平时看似微不足道,但却有可能在我们身处困境的时候提供巨大的帮助。
一只自负到极点的八哥鸟,捡起了一些孔雀脱落下来的羽毛,插在自己的羽毛中,于是就看不起自己的老伙伴了,满怀信心地走到了那些美丽的鸟群中。他们立刻发觉了这个闯进来的家伙,拔掉了他身上捡来的羽毛,并且用嘴啄他,把他赶了出去,不幸的八哥受到了严重的惩罚,感到非常难过,于是又去投奔自己的老伙伴,满想若无其事地又和他们混在一起,但是他们想起了过去他那副骄傲自大的神气就把他从队伍中轰了出来,不久以前曾受过他轻视的一个伙伴教训他说:"如果你过去满足于你自己的天生模样,你就不会受到比你美的人的惩罚,也不会受到跟你相同的人的鄙视了。"
A lion once fell in love with a beautiful girl, so he went to her parents and asked them to marry her to him.
The old parents did not know what to say.
They did not like the idea of giving their daughter to the lion, but they did not want to enrage the king of beasts.
At last the father said, "We are glad to marry our daughter to you, but we fear that you might possibly hurt her. So if you remove your claws and teeth, we will give her to you."
The lion loved the girl very much, so he trimmed his claws and took out his big teeth. When he came to the parents again, they simply laughed in his face, and beat him out of their house.
恋爱中的狮子
●一只狮子爱上了一位美丽的女孩儿,便找到她的父母向她求婚。
●女孩儿的父亲不知道该如何回答,他不忍将女儿许配给野兽,但又害怕激怒这兽中之王。
●于是父亲说:“我们很乐意将女儿嫁给你,但又怕你不小心伤害她,如果你拔去牙齿,剁掉利爪,我们就将女儿嫁给你。”
●狮子非常爱这个女孩儿,于是他修剪了爪子,拔掉了尖牙后又去找女孩的父母。可是这时,他们嘲笑他,并把他赶了出去。
寓意: 有些人轻易相信别人的话,抛弃自己的长处,结果轻而易举地被原来害怕他们的人击败了。
The hare was once boasting of his speed before the other animals. "I have never been beaten," he said, "when I run at full speed, no one is faster than me."
The tortoise said quietly, "I will race with you." "That is a good joke," said the hare. "I could dance around you the whole way."
The race started. The hare darted almost out of sight at once. He soon stopped and lay down to have a nap.
The tortoise plodded on and on. When the hare awoke from his nap, he saw the tortoise was near the finish line, and that he had lost the race.
龟兔赛跑
●兔子向动物们夸耀他的速度,“我从来没有失败过,”他说,“当我奔跑时,没有人比我更快。”
●乌龟平静地说:“我要与你比赛。”“真是笑话,我可以边玩边和你赛跑。”兔子说。
●比赛开始了,一眨眼工夫,兔子已经跑得不见了踪影,但是他觉得自己跑得快,对比赛掉以轻心,躺在路边睡着了。
●乌龟慢腾腾地却持续不停地走,当兔子一觉醒来,他看到乌龟已经快到终点线了。兔子输了比赛。
寓意: 骄兵必败;只有持之以恒,才能实现目标。
© 2022 xuexicn.net,All Rights Reserved.