2022年数学人教版四年级上册第三单元测试题 .pdf

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1、数学人教版四年级上册第三单元测试题一、口算（16 分）1505=1902=2107=3502=183=6080=354=1850=3012=234 = 3080=2530=49104701995922189202二、填空。（12 分）1、123 个 56 的和是多少列式为（） ，积是（） 。2、180 40 先口算出（） （）的积，再在积的末尾添上（）个 0。3、（）时间路程。4、师大附小在校学生人数已达到4034人，大约是（）人。5上海磁悬浮列车每小时行驶的速度是340 千米，可以简写成（） 。6、在里填上 “ ” 、“ ” 或“ ”36 12012 360 120 40 10 400 精选

2、学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 1 页，共 19 页24 20 480 10 300 5 50 30 三、判断。（对的打 “”,错的打 “” 10 分）1、203 50 积的末尾有2 个 0 （）2、三位数乘两位数积一定是五位数。（）3、用 5 倍的放大镜看一个30 度的角，看到的角的度数应该是150 度。（）4、两个数相乘的积一定比其任何一个数大。（）5、一个因数扩大（或缩小）若干倍，积也扩大（或缩小）若干倍。（）四、轻松选择（10 分）1、两数相乘，如果一个因数扩大3 倍，要使积不变，另一个因数应（）。A乘 3 B.除以 3 C.不

3、变2、两位数乘两位数的积（）。A.是四位数B.是三位数C.可能是三位数也可能是四位数3、估算 146 43，最合适的算法是（）。 A100 40 B.15040 C.10045 4、下列算式（）的积与 340 200 的积不相等。 A170 400 B.640100 C.680100 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 19 页5.小明 3 分钟行了 180 米，求他每分钟行多少米？运用数量关系是（）。A速度 时间 =路程 B.路程 速度 =时间 C.路程 时间=速度五、算一算（26 分） 1、笔算 （20 分） 63218

4、 30845 480 50 10950 2、列式计算（ 6 分）1、26 的 45 倍是多少？2、一个因数是35，另一个因数是142，积是多少？六、解决问题（26 分）精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页，共 19 页 1、王伯伯到超市买塑料桶，每个塑料桶18 元，他想买5 个，王伯伯带了 100 元，钱够吗？（ 5 分）2、一个坏掉的水龙头每分钟要白白流掉168 克水， 15 分钟要浪费掉多少克的水？（5 分）3、学校准备发课外书，发给16 个班，每班 140 本，还需要 50本作为捐赠灾区的物品，学校应买多少本课外书？（5 分

5、）4、甲地到乙地共2000 千米，汽车从甲地出发开往乙地，行了16 小时，每小时行65 千米，这时汽车离乙地还（5 分）5、张大伯把一车蔬菜送到菜市场，去时的速度是40 千米/时，用了 3 小时送到，返回时只用了2 小时，返回的速度是多少？精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页，共 19 页（6 分）when I arrived in Buenos Aires in the beginning of 2010, I could barely order food in a local restaurant. Two years la

6、ter, I calmly explained the mechanics of Russian grammar to a Guatemalan friend in her native Spanish. Today, Im conversationally fluent in both Spanish and Brazilian Portuguese, and low conversational in Russian. Im not going to blow smoke up your ass and tell you it was easy or that theres some sh

7、ortcut or hack. I practiced my ass off. Honestly, Ive seen the supposed “hacks ” for language-learning, and none of them worked for me. It took hours of study combined with stumbling through many, many conversations. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页，共 19 页Here are some language- le

8、arning tips Ive gathered over the past few years: 1. Conversation, Conversation, Conversation.If theres a “secret” or “hack ” to learning a new language, its this: hours and hours of awkward and strenuous conversation with people better than you in that language. An hour of conversation (with correc

9、tions and a dictionary for reference) is as good as five hours in a classroom and 10 hours with a language course by yourself. There are a few reasons for this. The first is motivation. I dont care how cool your study guide is, youre going to be far more invested and motivated to communicate with a

10、live person in front of you than a book or audio program on your computer. The second reason is that language is something that needs to be processed, not memorized. Im no expert on language learning, but in my experience staring and memorizing a word in a book or with flashcards 100 times does not

11、stick the same way that being forced to use a word in conversation a mere two or three times does. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 6 页，共 19 页I believe the reason is that our minds place more priority on memories which involve actual human and social experiences, memories which have em

12、otions tied to them. So, for instance, if I look up the verb for “to complain” and use it in a sentence with a new friend, chances are Im always going to associate that word with that specific interaction and conversation I was having with her. Whereas I can blow by that same word 20 times with flas

13、hcards, and even though I may get it right, I haven t actually practiced implementing it. It means nothing to me, so it is less likely to stick with me. 2. Intensity of study trumps length of study. What I mean by this is that studying a language four hours a day for two weeks will be more beneficia

14、l for you than studying one hour a day for two months. This is one reason why so many people take language classes in school and never remember anything. It s because they only study 3-4 hours per week and often the classes are separated by multiple days. Language requires a lot of repetition, a lot

15、 of reference experiences, and a consistent commitment and investment. Its better to allot a particular period of your life, even if its only 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 7 页，共 19 页1-2 weeks, and really go at it 100%, than to half ass it over the course of months or even years. 3.

16、Classes suck and are an inefficient use of time and money. All things considered, you get a really poor return for your time and effort in group classes. There are two problems. The first is that the class moves at the pace of its slowest student. The second is that language learning is a fairly per

17、sonal process everyone naturally learns some words or topics easier than others, therefore a class is not going to be able to address each students personal needs as well or in a timely fashion. For instance, when I took Russian classes I found verb conjugations to be simple because I had already le

18、arned Spanish. But an English classmate struggled quite a bit with them. As a result, I spent a lot of my class time waiting around for him to catch up. I also had a German classmate who had already been exposed to cases, whereas I had no clue what they were. Im sure he ended up waiting around for m

19、e to figure it out as well. The larger the classroom, the less efficient its going to be. Anyone who had to take a foreign 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 8 页，共 19 页language in school and retained absolutely none of it can tell you this. 4. Start with the 100 most common words. Not al

20、l vocabulary is made the same. Some gives you a better return on investment than others. For instance, when I lived in Buenos Aires, I met a guy who had been studying with Rosetta Stone for months (not recommended). I had been working on and off with a tutor for a few weeks, but I was surprised by h

21、ow he could not follow even the most basic of conversations despite months of study and living there. It turns out, much of the vocabulary he had been studying was for kitchen utensils, family members, clothing and rooms in a house. But if he wanted to ask someone which part of town they lived in, h

22、e had no idea what to say. Start with the 100 most common words and then make sentences with them over and over again. Learn just enough grammar to be able to do this and do it until you feel pretty comfortable with all of them. 5. Carry a pocket dictionary. This made a much bigger difference than I

23、 expected. I carry an English-Spanish 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 9 页，共 19 页dictionary app on my phone and I used it all the time when I live in Spanish-speaking countries. My first two weeks in Brazil, I was lazy and kept forgetting to download an English-Portuguese application.

24、I struggled in my conversations A LOT during those two weeks, despite knowing basic Portuguese. Once I downloaded the dictionary, there was an immediate difference. Having it on your phone is great, because it takes two seconds to look something up in the middle of conversation. And because youre us

25、ing it in conversation, youre that much more likely to recall it later. Even something that simple affected my conversations and ability to interact with locals a great deal. 6. Keep practicing in your head. The other use for your dictionary is that you can practice while going about your day and no

26、t talking to anyone. Challenge yourself to think in the new language. We all have monologues running in our head, and typically they run in our native tongue. You can continue to practice and construct sentences and fake conversations in your head in a new language. In fact, this sort of visualizati

27、on leads to much easier conversations when you actually have 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 10 页，共 19 页them. For instance, you can envision and practice a conversation about a topic youre likely to have before you actually have it. You can begin to think about how you would describe

28、your job and explain why youre in the foreign country in the new language. Inevitably, those questions will come up and youll be ready to answer them.7. Youre going to say a lot of stupid things. Accept it. When I was first learning Spanish, I once told a group of people that Americans put a lot of

29、condoms in their food. Later, I told a girl that basketball makes me horny. Um, yeah Its going to happen. Trust me.8. Figure out pronunciation patterns. All Latin-based languages will have similar pronunciation patterns based on Latin words. For instance, any word that ends in “-tion ” in English wi

30、ll almost always end in “-ci n” in Spanish and “ -?o” in Portuguese. English-speakers are notorious for simply adding “-o” “-e” or “-a” to the end of English words to say Spanish words they dont know. But stereotypes aside, its surprising how often its correct. “Destiny” is “destino,” “motive ” is “

31、motivo,” “part ” is “parte ” and so on. In Russian, case endings always rhyme with one another, so if you are 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 11 页，共 19 页talking about a feminine noun (such as “Zhen-shee-na”), then you know that the adjectives and adverbs will usually rhyme with its en

32、ding (“krasee-vaya” as opposed to “krasee-vee”).9. Use audio and online courses for the first 100 words and basic grammar. After that they should only be used for reference and nothing more. There are a lot of study materials: Pimsleur, Rosetta Stone, Berlitz, DuoLingo, etc. These courses are great

33、for getting you from absolutely no ability in a language to being able to speak basic sentences and phrases within a few days time. Theyre also good for teaching the most fundamental vocabulary (words such as: the, I, you, eat, want, thanks, etc.). But the weakness of study materials is that they do

34、nt allow for much useful practice. The greatest return on investment in language learning is forcing yourself to speak and communicate with others, and when you re sitting in your bedroom with a book or a software program, youre not being forced to formulate meaning and significance in the new langu

35、age on the spot. Instead, youre encouraged to parrot and copy concepts and patterns youve observed elsewhere in the materials. As mentioned before, I feel that these are two 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 12 页，共 19 页different types of learning and one is far more useful than the othe

36、r. 10. After the first 100 words, focus on becoming conversational. Studies have shown that the most common 100 words in any language account for 50% of all spoken communication. The most common 1,000 words account for 80% of all spoken communication. The most common 3,000 words account for 99% of c

37、ommunication. In other words, there are some serious diminishing returns from learning more vocabulary. I probably only know 500-1,000 words in Spanish and in most conversations I never have to stop and look a word up in my phone. The basic grammar should get you speaking fundamental sentences withi

38、n a matter of days. “Where is the restaurant?”“I want to meet your friend.”“How old is your sister?”“Did you like the movie? ”The first few hundred words will get you pretty far. Use them to get as comfortable as possible with grammar, idioms, slang 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 13

39、页，共 19 页and constructing thoughts, jokes and ideas in the new language on the fly. Once youre able to joke consistently in the new language, thats a pretty good sign that its time to expand your vocabulary out. A lot of people attempt to expand their vocabulary too quickly and too soon. Its a waste

40、of time and effort because theyre still not comfortable with basic conversations about where they re from, yet theyre studying vocabulary about economics or medicine. It makes no sense. 11. Aim for the brain melt. You know how when you do a lot of intellectually-intensive work for hours and hours on

41、 end, at some point your brain just feels like a lump of gravy? Shoot for that moment when learning languages. Until youve reached brain-gravy stage, you probably arent maximizing your time or effort. In t he beginning, youll hit mind-melt within an hour or two. Later on, it may take an entire night

42、 of hanging out with locals before it happens. But when it happens, its a very good thing.12. “How do you say X?” is the most important sentence you can possibly learn. Learn it early and use it often.精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 14 页，共 19 页13. One-on-one tutoring is the best and m

43、ost efficient use of time. It s also usually the most expensive use of time, depending on the language and country. But if you have the money, grabbing a solid tutor and sitting with him or her for a few hours every day is the fastest way to learn a new language I ve ever found. A mere two hours a d

44、ay for a few weeks with a tutor in Brazil got me to at least a respectable conversational level i.e., I could go on a date with a girl who spoke no English and maintain conversation throughout the night without making too much of a fool of myself. Speaking of which14. Date someone who speaks the tar

45、get language and not your native language. Talk about investment and motivation. Youll be fluent in a month. And best of all, if you make them mad or do something wrong, you can claim that it was lost in translation. 15. If you cant find someone cute who will put up with you, find a language buddy o

46、nline. There are a number of websites of foreigners who want to learn English who would be willing to trade practice time in their native language for practice in yours. Live Mocha is a great resource for this (Im 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 15 页，共 19 页not a huge fan of their less

47、ons, but the ability to video chat with other members is priceless). 16. Facebook chat + Google Translate = Winning.17. When you learn a new word, try to use it a few times right away. When you stop and look up a new word in conversation, make a point to use it in the next two or three sentences you

48、 say. Language learning studies show that you need to hit a certain amount of repetitions of saying a word within one minute of learning it, one hour of learning it, one day, etc. Try to use it immediately a few times and then use it again later in the day. Chances are itll stick.18. TV shows, movie

49、s, newspapers and magazines are a good supplementation. But they should not be mistaken or replacements for legitimate practice. When I was getting good at Spanish, I made a point to watch a couple movies each week and read an article on El Pa s each day. It was helpful for keeping me fresh, but I d

50、ont believe it was as helpful as my time spent in conversations. 19. Most people are helpful, let them help. If youre in a foreign country and making a complete ass out of yourself 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 16 页，共 19 页trying to buy something at the grocery store, ask random peop