作者：范良火
出版社：华东师范大学出版社有限公司
格式: AZW3, DOCX, EPUB, MOBI, PDF, TXT
一课一练.三年级数学.第二学期试读：
Preface to the English Language Edition
This English language edition of One Lesson One Exercise series is based on the latest Chinese edition of the Yi Ke Yi Lianseries，a multiple award-winning bestseller，published by East China Normal University Press.Since it first appeared in the early 1990s，the Chinese edition of the Yi Ke Yi Lianseries has been regularly revised and used by millions of students in primary and secondary schools all over Shanghai and beyond.The awards it has won include，for example，an official listing by an authoritative organization of China's book industry in 2009 as one of the “300 Most Influential Books in the 30 Years since Reform and Opening Up”（1978-2008），and in 2015，the series was awarded the title of “Shanghai Famous Trademark” by the Shanghai Administration for Industry and Commerce for the third time，the only book（series）awarded the honour by the Administration.
To keep the originality and authenticity of the Chinese edition，the English language edition is essentially a direct translation of the Chinese edition，so the loss of meaning in translation is kept to a minimum.When it is not possible to have a direct translation，necessary adjustments or changes have been made.For example，in Chinese，a Deng Shi（e.g.2+3=5）is different from a Fang Cheng（e.g.2x-3=7）； however in English，the word “equation” can apply to both a Deng Shi and a Fang Cheng.In this case，the questions in the Chinese edition were slightly changed when possible or deleted otherwise in this English language edition.When appropriate，a footnote has been added to remind the readers of the difference from the original Chinese edition.For readers' convenience，a Chinese-English mathematics glossary is also added at the end of each book in this English language edition.
Recognising the importance of doing adequate practice in the learning of mathematics，we have two main aims in publishing this English language edition.The first is for it to serve as a useful resource for school students，teachers and parents，not only in China but also in other countries，in their learning，teaching and tuition of mathematics using English as a medium.The second is to provide an important window for international readers，in particular mathematics teachers，mathematics education researchers and policy makers，to look through and thereby to understand better the content，pedagogy and assessment of Chinese mathematics teaching and learning in schools，as reflected in this series of learning resources.
It should be noted that the One Lesson One Exercise series was originally developed for the use of Shanghai school students to enhance their learning of mathematics，though more and more students outside Shanghai or even China have also used this series because of its reputation.Following the Shanghai school system，the series consists of 17 student practice books：one book for each semester for all the five primary grades（Grades 1 to 5）and the first three secondary grades（Grades 6 to 8），and one for the final secondary grade（Grade 9）.
Many people have supported the translation and publication of this series，in various ways.I wish to record my special appreciation to Professor Tim ROWLAND and Mrs Judy ROWLAND of the United Kingdom，Dr Lionel PEREIRA-MENDOZA of Canada，and Professor Zalman USISKIN of the United States for the consultation work they generously offered for the series at different grade levels.My sincere gratitude also goes to Ms Ellen CHEN，Dr JIN Haiyue，Dr Jane LI，Dr LU Rugang，Mr NI Ming，Ms XU Huiping，Mr XU Jing and Dr ZHU Yan for their assistance at different stages.
Professor FAN Lianghuo
Series EditorChapter 1Revising and improving1.1 Warm-up revisionBasic questions
1 Draw lines to match.
2 Use the column method to calculate.
3 Work these out step by step.
4 Calculate smartly.
5 Fill in the brackets.（1）Based on 52×3=156，work out mentally the result of each calculation below.
520×30=（ ） 52×（ ）=156000（2）In □293÷6，the greatest number that can be filled in the □ is（ ）for the quotient to be a three-digit number； and the least number that can be filled in the □ is（ ）for the quotient to be a four-digit number.（3）In 207×3，the product of “2” in the hundreds place multiplied by 3 is（ ）.
6 Multiple choice questions.（1）A three-digit number is multiplied by a one-digit number.The greatest possible product is（ ）.
A.a three-digit number
B.a four-digit number
C.a three-digit or four-digit number
D.uncertain（2）In □÷9=12……□，the greatest possible dividend is（ ）.
A.108 B.116 C.117 D.119（3）In □÷6=□……□，both the quotient and remainder are the same.In order that the dividend is the greatest，the remainder should be（ ），and the dividend is（ ）.
A.6 B.5 C.42 D.35
7 Application problems.（1）Xiao Pang has 135 yuan.Xiao Ya has 30 yuan less than 3 times as much as Xiao Pang.How much money does Xiao Ya have？（2）Mum went shopping at a supermarket.She bought a box of Sprite for 38 yuan，4 packs of potato chips at 12 yuan per pack and a bag of beef jerky for 20 yuan.How much did she pay in total？Enhancement and extension
8 How to calculate this correctly and quickly？（200+198+196+…+2）-（1+3+5+…+199）1.2 Four operations with round bracketsBasic questions
1 There are 964 books in a school library.300 books are lent to Grade 5 and then the remaining books are given to the other 4 grades equally.How many books is each of these four grades given？（1）Draw a line diagram：（2）Write number sentences step by step：
__________
__________（3）Write a mixed number sentence：
__________
__________
Answer：__________
2 Compare，think carefully about the order of operations and then work these out step by step.
3 Work these out step by step.（Calculate smartly if possible）
4 Write the number sentences and calculate.（1）Subtracting the product of 5 and 25 from 400，what is the difference？（2）Subtracting the product of 56 and 7 from 456，what is the difference？（3）Subtracting the sum of 86 and 37 from 413，what is the result？（4）Dividing the sum of 85 and 125 by 5，what is the result？Enhancement and extension
5 Add brackets to the following number sentences to make the equations true.（1）3×174+26=600（2）168÷2×3=28（3）20+50×8=600-80+40（4）8×64-40=20×8+4×8（5）100÷5+5-5×2=0（6）100÷5+5-5×2=20（7）100÷5+5-5×2=401.3 Estimating areas（1）Basic questions
1 Estimate the area of the little tortoise.
There are（ ）squares it takes up entirely.There are（ ）squares it takes up more than half.The area of this little tortoise is about（ ）squares.
2（1）What are the areas of the shapes in the diagram below？2
① The area of the rectangle is（ ）cm.② The area of the 22triangle is（ ）cm.③ The area of the shape is（ ）cm.（2）Draw one of your favourite cartoon characters on the grid first，and then work out its area.
The cartoon character you drew takes up（ ）whole squares，the number of squares that it takes up greater than half is（ ），and its area is（ ）.Enhancement and extension
3 How large is the area of the cat in the diagram below？1.4 Square decimetresBasic questions
1 Use letters to represent the units as indicated in the table below.
2 Let's measure and then fill in the brackets.（1）Your pencil case is about（ ）cm long and about（ ）cm 2wide.Its area is about（ ）cm.（Round to the nearest whole number）（2）The book in your hands，One Lesson One Exercise ，is 2about（ ）dm long and about（ ）dm wide.Its area is about（ ）dm.（Round to the nearest whole number）
3 Multiple choice questions.（1）Choose a suitable unit.
The area of a handkerchief is about 400（ ）.
The length of a mobile phone is about 15（ ）.
Dad's height is about 180（ ）.
The area of a classroom is about 50（ ）.
The area of a postage stamp is about 4（ ）.
The area of the front cover of a maths book is about 470（ ）.
The length of the podium in a classroom is about 8（ ）.
The area of a football field is about 5400（ ）.222
A.m B.dm C.cm D.m E.dm F.cm（2）Choose a suitable quantity.
A.5 square metres
B.50 square decimetres
C.5 square decimetres
A.8 square metres B.800 square centimetres
C.80 square centimetres
4 Fill in the brackets.22
8m=（ ）dm 3m=（ ）cm22
600mm=（ ）dm 10000cm=（ ）m22（ ）dm=700cm （ ）cm=80dm22
5100dm=（ ）m （ ）m=2000cm
9 m=（ ）dm 200mm=（ ）cm
5 Fill in the○with “＞”，“＜” or “=”.2222
8m○80dm 7m○700cm 10m 5dm○105dm22222
310cm○310dm 9dm○96m 12m○1300dm-2m
6 Put the following areas in order from the largest to the smallest.22222
3dm3cm 30dm 300cm 3m
__________
7 True or false.（1）6 metres are 60 centimetres longer than 5 metres 40 centimetres.（ ）22（2）Ten 1 m is 1000dm.（ ）（3）The area of the bottom of a swimming pool is 200 square metres.To tile the bottom of the swimming pool with tiles of area 4 square decimetres，one would need 500 such tiles.（ ）Enhancement and extension
8 Write a suitable unit in each bracket.
1（ ）＜2（ ）＜3（ ）
1（ ）＜1（ ）＜1（ ）
50（ ）+50（ ）=1（ ）
9 On the grid below，draw 2 squares with side length 6 centimetres，side by side.What is the sum of the areas of the two squares？1.5 Areas of composite shapesBasic questions
1 Use a variety of methods to work out the area of the shape below，and see which method is the best.（unit：centimetre）
Method One：
Method Two：
Method Three：
2 According to the shapes，pair up each number sentence for calculating the area with the shape（s）analysed.（1）2×2+（3+2+3）×2（ ）（2）（2+2）×（3+2+3）-2×3×2（ ）（3）2×2×2+3×2×2（ ）
3 Application problems.（1）A rectangular flowerbed has a length of 11 metres，which is 3 metres longer than its width.What is the area of the flowerbed？（2）A rectangular piece of paper is 16 centimetres long and 10 centimetres wide.The largest possible square is cut off the paper.How many square centimetres is the area of the remaining part of the paper？（3）The Lins has a rectangular orchard with length 80 metres and width 60 metres.A peach tree is to be planted in every 4 square metres.How many peach trees can be planted in the orchard？（4）The length of each side of a square tablecloth is 10 decimetres.If this original length is reduced to 8 decimetres，then how many fewer square decimetres is the area of the new tablecloth than the area of the original one？Enhancement and extension
4 A square is divided into 5 identical rectangles.The perimeter of each rectangle is 60 centimetres.Find the area of the square.Unit test 1
1 Work these out mentally and write down the answers.（16%）
2 Use the column method to calculate.（Check the answers to the questions marked with “*”）（8%）
3 Work these out step by step.（Calculate smartly if possible）（18%）
4 Calculation with shapes.（8%）（1）Find the area of the shape.（unit：centimetre）（2）Find the area of the shaded part.（unit：decimetre）
5 Fill in the brackets.（16%）（1）（ ）m=60000cm 800000g=（ ）kg2222
3000cm=（ ）dm 1200m=（ ）dm（2）Let's count and find the area that the shape of the duckling 2takes up.（Each small square is 1cm）
There are（ ）squares it takes up entirely.
There are（ ）squares it takes up half or more than half.2
The area of the shape of the duckling is about（ ）cm.（3）Fill in the（ ）with suitable units.
The height of the flagpole in a school is 8（ ）.
The area of a children's handkerchief is 400（ ）.
An apple weighs 300（ ）.
A car travels at 80（ ）per hour.（4）In △÷8=16……○，the greatest possible number in the○is（ ）.In this case，△=（ ）.（5）Add suitable +，-，×，÷ or（ ）to make the following equations true.
6 Multiple choice questions.（3%）（1）The length of the blackboard in a classroom is about 30（ ）and its area is about 3（ ）.222
A.m B.dm C.cm D.m E.dm F.cm（2）A fruit shop received a delivery of 260 kilograms of watermelons on the first day.The amount received on the second day was twice the amount received on the first day.How many kilograms of the fruit were delivered in two days？ The correct number sentence is（ ）.
A.260×2-260 B.260×2+260
C.260÷2+260 D.260÷2-260（3）Use 12 sticks each with length 1 centimetre to form rectangles of different sizes.The area of the largest rectangle is（ ）.2222
A.5cm B.6cm C.8cm D.9cm
7 True or false.（3%）（1）The side length of a square is 1 decimetre.Then its area is 100 square centimetres.（ ）（2）After at least 2 is added to 1252，the remainder of the sum divided by 6 is zero.（ ）（3）If the quotient of □89÷8 is a two-digit number，then the greatest number that can be filled in the □ is 8.（ ）
8 Application problems.（28%）（1）Look at the diagram.Please calculate the area of the shaded part.（2）A driver whose 12 points have been fully deducted due to traffic violations will have to “retake” the driving test.In April，Driver Xiao Zhang was deducted 2 points for not wearing a seatbelt，and 3 times as many points for occupying the emergency lane in an expressway.In May，the points he was deducted because of violating the ban signs were half of the points deducted for occupying the emergency lane.How many more points did he have left for deduction before he would have to “retake” the test？（3）As the new school semester started，we should prepare some ☆ to reward ourselves.
① Teacher Wang gave us 100 pieces of red paper.8 ☆ can be cut out from each piece.How many ☆ can be cut out in total？
② Teacher Zhang gave us another 56 pieces of paper.Now how many ☆ can be cut out in total？
③ If all the ☆ cut out are given to six groups equally，how many ☆ can each group get？
④ There are（ ）children in our class.If each one strives to get one ☆ every week，will these ☆ be enough to use for the whole semester？ How about if each child strives to get two ☆？（Take a semester as 18 weeks）Chapter 2Multiplying and dividing by two-digit numbers2.1 Speed，time and distance（1）Basic questions
1 Fill in the table.
2 Choose a suitable unit.（kilometre/hour，kilometre/minute，metre/minute）
The pigeon flies at a speed of 65（ ）.
The lion runs at a speed of 1（ ）.
试读结束[说明：试读内容隐藏了图片]