畅优新课堂数学答案

【篇一：畅优新课堂七下数学】

4、如果一个等边三角形的周长是a米，那么它的每一条边长是( )米。

5、 当a＝4，b＝0.3，c＝5时，ab＋c的值是(

6、在 ○里填上＞、＜或＝。

约会有（

10、一个直角三角形的三条边分别是6厘米，8厘米和10厘米，这个三角形的面积是()平方厘米，斜边上的高是( )厘米。

二、静心辨真假。（5分）

1、含有未知数的式子叫做方程。…………………………（ ）

2、周长相等的两个平行四边形面积也相等。…………………………（

） ） 4、等底等高的两个三角形面积相等，面积相等的两个三角形肯定等底等高。……（

5、4.16666可以简写成4.16。…………………………（

三、用心选一选。（10分）

1、下面式子中不是方程的是（

2、两个（ ）的梯形可以拼成一个平行四边形。

a、完全相同 b、面积相等c、等底等高

3、小强今年a岁，小红比小强大2岁，再过三年小强比小红小（）岁。

a、（a-3）岁 b、2岁 c、5岁 d、（a+3）岁

4、三角形的面积为s平方厘米，高是4厘米，那么底是（ ）厘米

） 5、在两个完全一样的长方形中，阴影部分的面积（

甲 乙

a、甲﹤乙 b、甲﹥乙 c、甲=乙 d、无法判断

四、细心算一算。（42分）

1、口算 （6分）

2、递等式计算（能简便的要简便） (6分)

3、列竖式计算（6分）

（商用循环小数表示）

4、解方程（12分）

x＋3.2＝7.4

0.15x－3.8＝8.5

5、算面积（右边两个算阴影部分面积。单位：厘米）（12分）

五、灵活用一用（28分）

1、请你连一连。

2、在一块平行四边形地里共收稻谷32400千克。已知平行四边行地的底450米，高120米，平均每公顷产稻谷多少千克？

3、敏敏带10元钱去买文具，每支铅笔1.2元，每本练习本0.7元，每张彩纸0.2元，敏敏买了5支铅笔，剩下的钱买彩纸，还可以买几张彩纸？

4、一辆汽车前2小时一共行80千米，后2小时分别行了43.5千米和44.5千米，这辆汽车平均每小时行多少千米？

5、上个月张明的爸爸妈妈的工资收入一共是3000元，爸爸的工资正好是妈妈的1.5倍，爸爸妈妈的工资各是多少？（用方程解答）

6、爸爸要给客厅铺地砖，若用边长是40厘米的地砖需要125块。

（1）若用边长是50厘米的地砖需要多少块？

（2）边长是40厘米的地砖每块16.8元，铺每平方米地面的手工费是13.5元。边长是50厘米的地砖每块28元，铺每平方米地面的手工费是12.5元。铺哪一种地砖的花费少？

【篇二：畅优新课堂八年级】

“f”（10%）

（ ）1. housecount （ ）2. big kite

（ ）3. hole rose （ ）4. peach bread

（ ）5. soap boat （ ）6. fatherask

（ ）7. face hat（ ）8. tail pain

（ ）9. thinkthat（ ）10. day sunday

二、选出不同类的一项（5%）

（ ）1. a. sick b. feverc. happy d. headache

（ ）2. a. head b. fingerc. eard. sharpener

（ ）3. a. excited b. hurt c. bored d. tired

（ ）4. a. tiger b. motherc. brother d. father

（ ）5. a. kick b. match c. bounce d. pass

三、根据句子意思，填上适当的单词（5%）

1. john’s father is very _______ because he failed the english test.

2. i am going on a big trip. i am so _______.

3. i ran in the rain yesterday. i have a ______ today. and now i have a fever.

4. if you eat many ice-creams, you will have a _________.

5. my mother is going on a trip without me. i’m very ________.

四、根据问句，选择相应的答句（5%）

（ ）1. how do you feel?a. he’s tired.

（ ）2. do you have a headache?b. yes, it does.

（ ）3. why do you feel happy? c. no, i don’t

（ ）4. how does he feel?d. because our class won the game.

（ ）5. does your nose hurt? e. i feel sick.

五、单项选择（10%）

（ ）1. –thanks a lot. –__________.

a. no thanks. b. i’m ok. c. you’re welcome. d. thank you.

（ ）2. what’s wrong ______ you?

a. in b. with c. for d. to

（ ）3. if you are sick, ________.

a. see the doctor b. see youc. see the film d. do sports

（ ）4. if you are ill, _______ some medicine.

a. drink b. get c. take d. bring

（ ）5. –i failed the math test. – __________.

a. sorry b. excuse me c. that’s alld. i’m sorry to hear that

（ ）6. –how ____ lucy and lily feel? –_____________.

a. doesb. is c. dod. are

（ ）7. if you want to buy some medicine, you can go to the ___________.

a. hospitalb. bookshop c. garden d.. park

（ ）8. my nose ______.

a. is hurt b. are hurt c. hurt d. hurts

（ ）9. – ________ is your grandmother?– she’s fine.

a. what b. howc. whend. why

（ ）10. there _____ a football match between class 1 and class 3.

a. are b. havec. is d. has

六、连词成句，注意标点符号和大小写（10%）

1. sarah, are, how, you

2. so, today, you, happy, look

3. matter, is, with, what, the, you

4. throat, a, have, sore, i

5. tom, how feel, does, today

七、从下列单词中选择适当的词填空，完成句子（5%）

into, over, surprise, fine, excited, sad, happy, angry, bounces, hurts,

it’s sunday afternoon. the weather is1 . we are holding a basketball match between boys and girls. all the students are watching. they are2 .

look! sarah has the ball now. she is a good basketball player in our class. she passes it to amy. amy throws the ball3the basketball. yeah, it’s a goal! how4the girls are!

now, lily has the ball. she wants to pass it to lucy, but it hits her head. it5her head. she’s a little6 . just then a very short but smart boy called wu yifan catches the ball. he 7the ball and then passes it to zhang peng. zhang peng is standing under the basket. zhang peng

catches the ball and throws it to the basket. oh, no! to our8 , it flies9the basket and falls down to the ground from the other side of the basketball.

八、阅读理解（20%）

（1）

a young man cant sleep well at night. he is very worried and goes to see the doctor. the doctor looks him over carefully, but there is nothing wrong with him. the doctor tells him, count from 1 to 10 again and again when you cant sleep. but every night when he counts numbers to eight, he jumps up from bed quickly. so he looks more and more tired. the doctor feels surprised and asks him, why? the young man answers, “i am a boxer(拳击运动员).” 根据短文内容判断下列句子的正误，正确的在括号里写“t”, 错误的写“f”。（10%）

1. the young man goes to see a doctor because he cant sleep well. （ ）

2. there is something wrong with the young man.（ ）

3. the doctor says, “count from one to eight again and again when you cant sleep. ” （ ）

4. the young man cant sleep well after he counts numbers every night. （ ）

5. the young man is a boxer. （ ）

（2）

mrs black is very fat. so she goes to see the doctor.

doctor: good afternoon, madam. what’s the matter?

mrs black: good afternoon, doctor. i always feels very tired.

doctor: do you have a cold?

mrs black: no, i don’t.

doctor: do you have a fever?

mrs black: no, i don’t.

doctor: did you sleep well last night?

mrs black: yes, i did. i slept for 10 hours.

doctor: do you smoke?

mrs black: no, i don’t.

doctor: do you like drinks？

mrs black: no, i don’t.

doctor: did you have breakfast this morning?

mrs black: yes, i did. and i can eat a lot every day.

doctor: what do you have for meals every day?

mrs black: for breakfast, i often have two cups of milk, three hamburgers, four cakes, two eggs, a bag of french fries and two apples. for lunch, i often have some beef, some fish, a big bowl of soup, two plates of dumplings, three hot dogs, two pizzas and three bananas. for dinner, i often have….

doctor: i see, madam. you are eating too much. that’s the problem.

mrs black: you mean i am too fat?

doctor: yes, i think you can have one apple, one orange, one egg, some vegetables and a glass of water every day.

mrs black: before of after meals?

doctor: instead（代替） of them. and you need to do more sports every day.

根据对话的内容，选择合适的答案（10%）

（ ）1. mrs black is very _________.

a. thinner b. fatterc. thin d. fat

（ ）2. this afternoon she __________.

a. goes shoppingb: sees the doctor

c. goes to work d. visits her friend

（ ）3. what’s the matter with mrs black?

a. she has a cold. b. she has a fever.

c. she is eating too much.d. she can’t sleep well.

（ ）4. mrs black should _________ every day.

a. eat a lotb. drink a lot

c. sleep a lot d. do some sports

（ ）5. which of the followings is not true? （下面哪个句子是不正确的）

a. mrs black always feels tired.

b. mrs black is eating too much.

c. mrs black likes smoking.

d. mrs black doesn’t like drinks.

【篇三：【畅优新课堂】八年级数学下册 20.1 数据的集中趋势练习(无答案)(新版)新人教版】

>一、选择题

1、已知样本x1，x2，x3，x4的平均数是2，则x1＋3，x2＋3，x3＋3，x4＋3的平均数是（ ）

a. 2 b. 2.75c. 3 d. 5 2、下表是两个商场1至6月份销售“椰树牌天然椰子汁”的情况(单位：箱)

根据以上信息可知

a．甲比乙的月平均销售量大 b．甲比乙的月平均销售量小 c．甲比乙的销售稳定 d．乙比甲的销售稳定 3、为筹备班级的初中毕业联欢会，班长对全班学生爱吃哪几种水果作了民意调查．那么最终买什么水果，下面的调查数据中最值得关注的是

a．中位数 b．平均数 c．众数 d．加权平均数 4、已知一组数据5，15，75，45，25，75，45，35，45，35，那么40是这一组数

据的

a．平均数但不是中位数 b.平均数也是中位数 c．众数d. 中位数但不是平均数 5、某地连续九天的最高气温统计如下表：

则这组数据的中位数与众数分别是（）

a 24、25b 24.5、25 c 25、24 d 23.5、24 二、填空题

1、某电视台举办青年歌手演唱大赛，7位评委给1号选手的评分如下： 9.3 8.99.29.59.29.79.4 按规定，去掉一个最高分和一个最低分后，将其余得分的平均数作为选手的最后得分．那么，1号选手的最后得分是 分． 2、一段时间内，鞋店老板为了了解某品牌女鞋的销售情况，对各种尺码的销量进行了统计分析，在“平均数”、“众数”、“方差”等统计量中，店主最关注的统计量是 。 3、数据1，0，－3，2，3，2，－2的中位数是 ，众数是 ． 4、一组数据1，6，x，5，9的平均数是5，那么这组数据的中位数是 . 5、某超市招聘收银员一名，对三名申请人进行了三项素质测

试．下面是三名候选人的素质测试成绩：

公司根据实际需要，对计算机、商品知识、语言三项测试成绩分别赋予权重4、3、2，三人中 将被录用. 6、从全市5000份试卷中随机抽取400份试卷，其中有360份成绩合格，估计全市成绩合格的人数约为人。

三、解答题

畅优新课堂数学答案