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2019-2020年六年級下冊6.8《二元一次方程》word學(xué)案 一．學(xué)習(xí)目標(biāo) 1． 理解二元一次方程的有關(guān)概念． 2． 知道二元一次方程有無數(shù)個解，這些解的全體叫做二元一次方程的解集． 3． 能根據(jù)所給的二元一次方程，將一個未知數(shù)用另一個未知數(shù)表示. 4．能求一些二元一次方程的特殊解 二、新課學(xué)習(xí)： （一）知識回顧： 1． 方程中的元指的是什么？ 2. 項的次數(shù)是未知數(shù)的指數(shù)________，例如-3xy的系數(shù)是________,次數(shù)是________ （二）閱讀課本67-68頁 1．回答下列問題 （1）含有___________個未知數(shù)的___________次方程叫做二元一次方程. （2）二元一次方程的解有___________. 2. 指出下面的方程是不是二元一次方程： 3．將方程變形成用含有x的式子表示y，并分別求出x=3,x=-6時相應(yīng)的y的值. 4．將方程變形成用含有y的式子表示x，并分別求出時相應(yīng)的x的值. 三、課堂檢測： 1．二元一次方程有多少個解？其中的正整數(shù)解有哪些？ 2. 求方程3x+2y=8的正整數(shù)解 3.驗證. 四．思維拓展 已知方程 是二元一次方程，求m和n的值. 五、小結(jié)： 六、數(shù)學(xué)作業(yè)： 1、完成書P69/EX6.8/1、2、3、；2、完成練習(xí)冊6.8；3、課課練6.8；4、預(yù)習(xí)6.9 附送： 2019-2020年六年級下冊6B Unit3綜合測試卷 一、聽錄音，選出你所聽到的內(nèi)容。(每小題1分，共10分) ( ) 1. A. help B. healthy C. health ( ) 2. A. litter B. little C. letter ( ) 3. A. fruit B. food C. fish ( ) 4. A. diet B. diary C. dentist ( ) 5. A. never B. neck C. need ( ) 6. A. number B. December C. remember ( ) 7. A. meat B. meet C. meal ( ) 8. A. too many B. too much C. so much ( ) 9. A. at a time B. at lunchtime C. on time ( ) 10. A. a little B. a few C. a lot of 二、聽錄音，選擇正確的應(yīng)答句。(每小題1分，共5分) ( ) 1. A. Yes, I do. B. Yes, she does. C. Yes, she is. ( ) 2. A. I have some bread. B. It’s a steamed bun. C. Some porridge. ( ) 3. A. They’re three. B. Two. C. She likes eating eggs. ( ) 4.A. Yes, here you are. B. No, I can’t. C. No, thank you. ( ) 5.A. Yes, they are. B. Yes, there are. C. No, there isn’t. 三、聽錄音，根據(jù)短文內(nèi)容判斷正(T)誤(F)。(每小題1分，共5分) ( )1.Jack has two eggs for breakfast every day. ( )2.Jack doesn’t like vegetables. ( )3.Jack’s sister doesn’t like fruit. ( )4.Jack’s sister likes strawberries and some chicken for dinner. ( )5.Both of Jack and his sister like tomatoes. 四、聽錄音，完成短文。（10分） Sam ________ to go to the __________, because there is not much food in the _________. He________ a small bottle of cola, but he ________ drink too much cola, and he buys some fish, after that, he goes home, but the fish is too _________, the fish ________into the river, Sam feels very sad. 筆試部分（70分） 一、判斷劃線部分讀音是（S）否（D）相同。（每題1分，共9分） ( )1.world short ( )2. cousin mouth ( )3. mouse house ( )4.through shout ( )5. should would （ ）6.cow snow ( )7.speak sea ( )8.good cool ( ) 9.horse doctor 二、英漢互譯。（10分） 1. 有一個健康的飲食習(xí)慣 __2.have too much food 3.想和我一起去 4. some porridge and sausages 5. 只喝一點水 6. get out 7. 每天遲睡覺 8.take a small bottle 9. 一次吃得很少 10. keep…clean and tidy 三、 單項選擇。（每題1分，共15分） ( )1.-- Can you _______some hamburgers for me? I’m very hungry. --All right. A. take B. taking C. bring ( )2. He _______ my teacher in the playground just now. A. meets B. met C. meet ( )3.There is ________ water in the bottle. A. a few B. a little C. any ( )4. How many _______ are there in the basket? There are six. A. bread B. mangoes. C.meat ( )5. _______ your sister _______ a healthy diet？ A. Do; have B. Does; has C. Does, have ( )6. My teacher likes _______ bikes. A. riding B. rides C. ride ( )7. ______ a healthy diet, there is a lot of fruit and vegetables. A. In B. To C. On ( )8. We can eat_______ delicious food at Christmas. A. a lot of B. many C. a few ( )9.________ to the hospital faster, you can take a taxi. A. Get B. To get C . For get ( )10. I eat a few noodles _______ . A.in dinner B. of dinner C. for dinner ( ) 11.The girl dance _________, but the boy does not. A. beautiful B. careful C. beautifully ( ) 12. It _________ last year. A. snow B. snowed C. snowy ( ) 13.I’d like two _______ of milk for breakfast. A. bottle B. cups C. cartons ( )14.Can I have __________ apple juice? A. some B. many C. any ( )15.Liu Tao likes_____________. A. eat sweets B. eating sweets C. eating sweet 四、用所給詞的適當(dāng)形式填空。（每題1分，共6分） 1. He is asking Yang Ling how _________ (get) there. 2. They stopped the thief and _________ (take) him to the police station. 3. There_________ (be)eight bags of rice in the kitchen this morning. 4. I see a few_________ (tomato)in the basket. 5.What about_________ (drink)some coffee? 6.There (be not ) any meat on my plate now. 7. I ___________( visit) my grandparents next Sunday. 五、完成下短文，每空一詞。（每空0.5分，共5分） Mike likes e________ sweet food. He d________ like drinking water. He only d_______ a l________ water every day. He has some bread and milk for b________. He has a f________ eggs every day. Yang Ling likes sweet food, too, but she eats a little at a t________. She eats some f_________ every day. She has a lot of noodles for breakfast. S________ she eats an egg, too. Do they have healthy d________? 六、根據(jù)要求完成句子，每空一詞。（每空0.5分，共6分） 1. I have some bread and milk for breakfast. (對劃線部分提問) ________ ________ you have for breakfast? 2. There is some fruit and vegetables in a healthy diet. (改成一般疑問句) ________ ________ ________ fruit and vegetables in a healthy diet.? 3. Miss Li often buys things from shops.(用be going to 改寫句子) Miss Li ________ going to ________ things from shops. 4.Tim eats a lot of sweets every day.（改成否定句） Tim _______ ________ a lot of sweets every day. 5.My mother bought a lot of things last Weekends.(改為一般疑問句) _______ ______ mother _______ a lot of things last Weekends? 七、根據(jù)中文意思，完成下列句子。（每空0.5分，共8分） 1. 甜的食物很好吃，但是對你的牙齒不好。 Sweet food _______nice, but it is not _______ _______ your _______. 2. 你不應(yīng)當(dāng)吃太多的肉。 You _______ eat _______ ________ meat. 3. 我能吃一些面包嗎？ _______ I _______ ________ bread ？ 4. 她晚飯只吃一點米飯。 She _______ _______ a _______ rice for lunch. 5. 你應(yīng)該把你的書整理得井井有條。 You should _______ your _______ in _______. 八、閱讀理解。10 A．讀一讀，根據(jù)短文選擇正確答案。（每題1分，共5分） Most English people have four meals(餐飯)a day .They are breakfast, lunch, afternoon tea and dinner. People usually have breakfast at any time from seven to nine in the morning. Theyd like to have eggs，bread and milk. English people drink tea or coffee for breakfast. Lunch es at 1:00pm.Afternoon tea is from four to five in the afternoon and the dinner is about half past seven. First they have soup(湯),then they have meat or fish with vegetables. After that they eat some other things such as bananas, apples and oranges. But not all English people eat like that. Some of them have their dinner in the middle of the day. Their meals are breakfast, dinner, afternoon tea and supper and all these meals are very necessary(必要的). ( )1. Many English people have _____meals a day. A. two B. three C. four D. five ( )2. People may have_____ for their breakfast according to the passage. A. tea and eggs B. hamburgers and tea C. coffee and salad D. eggs and fish ( )3. People have lunch at ______. A. anytime B. nine C. five D. one ( ) 4. People don’t have _______ for their dinner. A．bananas and apples B．soup and meat C．meat and fish D．porridge ( ) 5. In some English families, dinner es________. A. in the morning B. at noon C. on Sunday D. in the afternoon B.閱讀短文，回答下列問題。（每題1分，共5分） My favourite fruit is apple. I like apples very much , because they are delicious. There are many kinds of apples, and they have different colours: red and green. Many red apples are sweet ,but a lot of green apples are not very sweet .So many people don’t like green apples at all. A lot of apples are from North(北方)China. Apples are good for our health, and they can make our faces red and pretty. Do you think so? You can have a try. Don’t forget that “An apple a day keeps the doctor away”. 1.What’s the writer’s favourite fruit? ___________________________________________________________________ 2.Are all the apples sweet? ___________________________________________________________________ 3.Do many people like green apples? Why ? ___________________________________________________________________ 4.Why does the writer like apples? ___________________________________________________________________ 5.What does“An apple a day keeps the doctor away” mean in Chinese? __________________________________________________________________ 聽力內(nèi)容 1、 聽錄音，選出你所聽到的內(nèi)容。（聽兩遍） 1.Yang Ling has a healthy diet. 2.Don’t litter in the park. 3.Would you like some fish ? 4.Does Wang Bing have a healthy diet? 5.I need some noodles for breakfast. 6.Do you remember these words? 7.For lunch and dinner, she eats some meat and some vegetables. 8.Don’t eat too much sweet food. 9.She eats a little at a time. 10.My mother only eats a little rice for lunch. 二、聽錄音，選擇正確的應(yīng)答句。（聽兩遍） 1.Does Helen have a healthy diet? 2.What does Yang Ling have for breakfast? 3.How many eggs does Su Hai have every day? 4.Can I have some cola? 5.Are there a lot of vegetables on the plate? 三、聽錄音，根據(jù)短文內(nèi)容判斷正(T)誤(F)。(聽三遍) Jack likes eggs, bananas and apples. So every day, he has two eggs, one apple, a cup of milk and some bread for breakfast.He likes vegetables a lot. For lunch, he has bananas, some chicken and vegetables. And he likes tomatoes, French fries and ice cream for dinner. His sister likes strawberries, oranges and apples. But she doesnt like vegetables. She often has some hamburgers, one apple and bread for her breakfast. She likes tomatoes, salad and some fish for lunch. For dinner, she likes strawberries and some chicken. 四、Sam has to go to the supermarket, because there is not much food in the fridge. He takes a small bottle of cola, but he can’t drink too much cola, and he buys some fish, after that, he goes home, but the fish is too heavy, the fish goes into the river, Sam feels very sad.