P5 Maths (新加坡 小学5年级 数学 练习 英文版).doc

Primary 5 MathematicsCHAPTER 1WHOLE NUMBERSNumber notation and place values up to 10 millionApproximation and estimationMultiplication and division of numbers up to 4 digits by a 2-digit whole numberOrder of operations1. Round off 69 570 km to the nearest 1 000 km. 2. Round off 7 534 089 to the neatest thousand.3. A schools population is 2 904. Round off this number to the nearest thousand.4. The value of the digit 8 in 980 036 is _ .5. What is the sum of the fourth multiple of 8 and the sixth multiple of 4?6. What is 100 tens less than 1 million?7. What is 90 hundreds more than 1 million?8. How many tens are there in 48 200?9. There are _ hundreds in 1 million.10. The value of the digit 8 in 487 543 is 8 x _.11. Write nine million, six hundred and seven thousand and eighty-four in figures. 12. Write five hundred and seven thousand and thirty-three in numerals.13. Evaluate (Solve) 507 x 28.14. The product of two numbers is 9 570. If the smaller number is 58, what is the bigger number?15. The sum of two numbers is 180. The difference between the two numbers is 26. Find the larger number.16. Find the value of 85 + 10 x (80 60 ) 4.17. Find the value of 42 + (139 19) 6 x 2.18. 162 x 15 = 162 x 10 + () What is the missing number in the box?19. What is the remainder when 2020 is divided by 8?20. When Sarah opens a book, the sum of the facing page numbers is 273. What is the smaller page number?21. Roy and Lin had the same amount of money. When he spent four times as much as Lin, he had $22 left while she had $49 left. How much did Lin have at first?22. There are _ tens in 1 million.23. The value of 9 in 129 300 is _.24. Write 1 489 311 in words: _CHAPTER 2 MONEY, MEASURES & MENSURATIONConversion of units of measure involving decimals and fractionsVolume of a cube and a cuboidArea of a triangle1. A wooden block measures 10 cm by 8 cm by 2.5 cm. If 4 such wooden blocks are packed exactly into a rectangular box, what is the capacity of the box?2. The area of a floor covered in square tiles if 1250 cm2. The length of each square tile is 5 cm. How many square tiles are there covering the floor?3. A papaya is as heavy as two oranges of equal mass. If the mass of each orange is 160 g , find the mass of 3 such papayas.CHAPTER 3 STATISTICSLine graphs (Reading , interpreting and solving problems)CHAPTER 4 GEOMETRYAngles on a straight line, angles at a point, vertically opposite angles8-point compassProperties of a parallelogram, rhombus, trapezium, and triangleGeometrical construction: Draw a square, rectangle, parallelogram, rhombus and triangle from given dimensionsTessellationCHAPTER 5 FRACTIONSAddition and subtractions of mixed numbers and unlike fractionsProduct of fractionsConcept of fraction as divisionDivision of a proper fraction by a whole number1. What is of 1h 8 min? _2. Express day in hours. _3. There are 18 apples and 12 oranges in a basket. What fraction of the fruits are oranges? _4. How many hours is of a day? _5. There are _ sixths in .6. Mr. Tan bought some tables. of them were red. The remaining 33 tables were white. How many tables did he buy altogether? Ans: _7. Carl had 8 m of rope. He cut out 3 pieces of ropes measuring 1 m each. Find the length of the rope left.Ans: _8. of a number is 36. What is of the number? _9. of the people at a concert were women and of them were children. If there were 300 men, how many women were there at the concert? Ans: _10. 27 kg of rice are shared equally among 7 people. How much rice does each person get? Leave your answer in its simplest form. _()11. Express 1 390 m as a fraction of 2 km._()12. A piece of wire m long is cut into 6 equal pieces. Amy used 3 pieces to tie some presents. What fraction of the wire did she use altogether?_()13. Find the value of 2 + 1 ._()14. Ben was told to guess a number. He guessed the number to be 8. His guess is of the actual number. What is the actual number?_()15. 10 girls received kg of strawberries each. What is the total weight of strawberries in kg? (Express your answer in its simplest form)_()16. Henry bought 60 m of ribbon. He gave away of the ribbon to Kelly. How many metres of the ribbon did he give away?_()17. Bala gave of his stamps to his brother and of the remainder to his sister. He had 10 stamps left. How many stamps did he have at first?_()18. A rabbit weighs kg. A hamster is of the mass of the rabbit. What is the total mass of the two animals? (Express your answer as a mixed number in its simplest form.)_()19. A pair of jeans cost 3 times as much as a skirt. Brenda spent of her money on some skirts and half of her remaining money on a pair of jeans. How many skirts did she buy?_()CHAPTER 6 DECIMALSMultiplication up to 2 decimal places by a 2-digit whole numberMultiplication and division up to 3 decimal places by tens, hundreds, thousands1. Zafran paid $243 for 90 markers. If the price of each marker decreased by $0.60, how many more markers could he buy with the money he had? -()2. Round off 9.837 to 1 decimal place. -()3. Round off 202.028 to 2 decimal place. -()4. Round off 29.192 to 2 decimal place. -()5. 3 ones, 50 hundredths and 2 thousandths is _.6. 10 tens, 9 hundredths and 7 thousandths is _ .7. Ray finished 2/3 of his Math homework. What percentage of his homework did he finish? Give your answer rounded off to 2 decimal places.-()8. In every litre of honey water juice, there is 200 ml of honey syrup. The rest of the juice is made up of water. How much water will there be in 3.5 litres of honey water juice? Leave your answer in litres. -()CHAPTER 7 AVERAGE, RATE & SPEEDAverageRate1. Joyce can write 28 words in 2 minutes. At this rate, how many words can she write in 8 minutes?CHAPTER 8 RATIO & PROPORTION1. () : 6 = 28 : 42. Fill in the missing number in the bracket.2. There are 30 buttons in a box. 10 buttons are black and the rest are white. What is the ratio of the black buttons to the white buttons?-()3. Lina saves $53 a month. How much will she save in 2.5 years? -()4. There are 48 pens and 72 pencils in a container. What is the ratio of the number of pencils to the number of pens?-()5. The marks May and Brenda scored in an Chinese test are in the ratio of 3 : 5. If May has 18 marks less than Brenda, how many marks did May score? -()6. There are 800 men and women at a party. 300 of them are women. What is the ratio of the number of men to the number of women at the party? -()7. The ratio of the number of teachers to pupils at a school is 1 : 9. If there are 108 pupils, how many teachers are there?-()8. A piece of wire of 160 cm long was cut into 2 pieces in the ratio of 6 : 2. The shorter piece was bent to form a square. What is the length of the square? -()9. The ratio of Tinas mass to Joyces mass is 4 : 3. If Tinas mass decreased by 6 kg and Joyces mass is increased by 1 kg, Tina will have the same mass as Joyce. What is Joyces original mass?-()10. Andy, Ben and Cavin have a total sum of $96. Andy and Ben have $80. What is the ratio of Cavins share to the total sum of money?-()11. 3 chickens cost $36 and 8 fishes costs $72. How much does 6 chickens and 4 fishes cost altogether?-()12. A taxi can carry maximum of 4 passengers. What is the least number of taxis needed to transport 21 passengers?-()13. If Gary packed 40 apples in each crate, what was the minimum number of crates he needed to pack 4860 apples?-()14. The ratio of Marcuss age to Franciss age is 5 : 6. Their total age is 77 years. How old is Marcus?-()15. The area of a rectangle is 72 cm2. Its length is 18 cm. What is the ratio of the length to its breadth?-()16. The number of chickens and ducks on a farm is in the ratio of 4 : 7. There are 21 more ducks than chickens. How many chickens and ducks are there altogether?-()17. Jill had 150 stamps. She kept half of them and shared the rest between Grace and Ahmad in the ratio of 2 : 3. How many stamps did Ahmad receive?-()18. Charles could buy 8 plums and 5 mangoes with $8.00. He could buy 16 such plums with the same amount of money. If he decides to buy mangoes only, how many mangoes can he buy with $100?-()19. Henry won $2 400 in a contest. He kept of it and gave the remainder to his wife, sister and brother. His wife received 2/3 of the money, his sister received of it and his brother received the rest.a. How much did his wife receive?b. What is the ratio of his wifes share to his brothers share?20.CHAPTER 9 PERCENTAGEConcept of percentagePercentage of a quantity1. Express 1 1/5 as a percentage.2. Raymund was given a 20% discount for a meal that cost $6. How much did he pay for the meal?Percentage and Problem SumsDate: 18 July 20101. Express as a percentage.2. Express 28% as a fraction in its simplest form.3. Express % as a fraction in its simplest form.4. Raymund was given a 20% discount for a meal that cost $6. How much did he pay for the meal?5. During a sale, Alicia was given a 15% discount for a book that cost $12. How much would she save if she buy the book during the sale?6. David saved $9 every day. After a number of days, he used all the money that he had save to buy a few storybooks that cost $21 each.(a) What was the least number of days that he needed to save in order to buy the storybooks?(b) How many storybooks did he buy?7. There were some markers in a box. of the markers were black and the rest were red. of the black and of the