《2025年快乐过暑假江苏凤凰科学技术出版社四年级提优版》

五、用计算器计算出下面算式的结果,你从中发现了什么规律?
$142857×1=$142857 $142857×2=$285714
$142857×3=$428571 $142857×4=$571428
$142857×5=$714285
我发现：142857 分别乘 1、2、3、4、5、6,所得积仍由 1、4、2、8、5、7 这六个数字按一定的顺序排列组成。

答案： 142857 285714 428571 571428 714285 我发现：142857 分别乘 1、2、3、4、5、6,所得积仍由 1、4、2、8、5、7 这六个数字按一定的顺序排列组成。

六、新考法 规律探究 计算。
$\underbrace{66…6}_{12个6}×\underbrace{99…9}_{12个9}=$666666666665333333333334

答案： 666666666665333333333334

一、判断画线部分读音是(T)否(F)相同。
(T)1. bike kite time white
(T)2. it winter this swim
(F)3. Chinese milk like picture
(F)4. in hi bike fridge
(F)5. skating is Chinese time

答案： 1.T 2.T 3.F 4.F 5.F

1. Let's go swimming on Saturday.
2. It's very hot in summer.
3. I usually go skating in winter.
4. Is that your cake? It's nice.
5. It's a sunny day. Let's go to the park.
6. We make many snowmen this winter.
7. Yang Ling can fly kites on Saturday.
8. Mike and Liu Tao usually go climbing in autumn.

答案： 1. go; swimming
2. hot
3. skating
4. your
5. sunny
6. snowmen
7. fly
8. go; climbing

三、新情境 介绍玄武湖四季 玄武湖是江南三大名湖之一,方芳正在向来自英国的交换生 Tom 介绍玄武湖的四季之景。从方框中选择合适的句子,完成对话。(有一项多余)
Fang Fang: Xuanwu Lake is famous in China. We can enjoy four seasons there.
Tom: Sounds great. What do you do in spring?
Fang Fang: 1. A It's fun.
Tom: 2. B
Fang Fang: I go boating with my friends.
3. E
Tom: What about autumn?
Fang Fang: 4. C We often have picnics.
Tom: Do you like winter there?
Fang Fang: 5. F I can make snowmen.

答案： 1.A 2.B 3.E 4.C 5.F