What is the wrong-prone problem set in the second volume of the fifth grade of Jiangsu Education Press? 1. Fill in the blanks? 1. Cut the 5m-long rope into 4 sections on average, each section (? ) meters, the total length of each section (? ) 2. Give 4 children an average of 3 kilograms of fruit, each child will be given () copies of this 3 kilograms of fruit, and each child will be given 3 copies of () kilograms. Master Wang made 5 parts in 8 minutes, and can make () parts per minute. Need (? ) minutes? Cut from a 4.5-meter-long rope 15? M, there is () m 5 m long rope left. Cut off its 15? , () Mi Zuo? 5.？ 68? Numerator plus 9, denominator plus () fraction unchanged? 6. What is the smallest three digits divisible by 2 and 3 at the same time? ) The smallest three digits that can be divisible by 3 and 5 at the same time is (? What is the smallest three-digit number that can be divisible by 2, 3 and 5 at the same time? What is the largest two-digit number that can be divisible by 2 and 3 at the same time? What is the largest two-digit number that can be divisible by 3 and 5 at the same time? )? What is the largest two-digit number that can be divisible by 2, 3 and 5 at the same time? The largest prime number in) 100 is () the largest prime number in 50 is () the sum of all prime numbers in 7.20 is () the sum of all composite numbers in 20 is () the sum of all odd numbers in 20 is () the sum of all even numbers in 20 is () 8. A three-digit number, one unit is the smallest composite number, and ten digits are the smallest prime number. 9. A basket of apples, two for one, three for one, four for one, five for one, and there is only one left. This basket of apples has at least (? ) 10. A number is both a multiple of 6 and a factor of 48. This number may be (? )

In 1 1.20, what are the odd and composite numbers? ) 12. What is the sum of all the simplest true fractions with a denominator of 8? Is the sum of all true fractions whose denominator is 8 ()? 13. The sum of the sides of a cube is 60 cm. What is its surface area? ) The volume is (? ) 14. The largest four-digit number that can be divisible by 2, 3 and 5 at the same time is () 15. Cut a large colored cube into eight small cubes, and the colored ones on three sides are (? ) shielding? Cut a big color cube into 27 small cubes, and three sides are coated with () blocks? There are () paintings on both sides and (? ) a block drawn on the 1 surface. ) pieces, and 0 side is coated with () pieces? 16.A=2×2×3×5×7？ B=2×3×7？ What is the greatest common factor of a and b? The least common multiple of a and b is () 17. The numerator of a fraction is enlarged 3 times, the denominator is reduced 2 times, and the fractional value is ()? The numerator of a fraction is reduced by 3 times, the denominator is enlarged by 2 times, and the fractional value ()? The numerator of a fraction is magnified three times, the denominator is magnified three times, and the fractional value is () 18. When the side length of a cube is doubled, the sum of its side lengths is enlarged () times, the surface area is enlarged () times, and the volume is enlarged (? ) era? When the side length of a cube is enlarged by 3 times, its total side length is enlarged by () times, its surface area is enlarged by () times and its volume is enlarged by (? ) era? 19. The simplest true score with denominator of 9 is (? ), and their sum is (? ) The true fraction with a denominator of 9 is (? ), and their sum is (? ) The numerator is 9 and the false score is (? ) A factor of 20.36 is (? ) 2 1. There are 44 students, 24 girls, () girls and () boys in the class. ), if boys and girls are divided into equal groups, they can be divided into () groups, each with a maximum of () 22.58? Rice is (? )18m? , it can also be (? The volume of a Rubik's cube is about 30 (), and the volume of a car fuel tank is about 30 (? )? The volume of an eraser is about 8 () and the length of one step is about 6 ()? 24. 152 decomposition prime factor is (? )?

25. The natural number A is 1 1 times of B, and the greatest common factor of A and B is (? )? The least common multiple of a and b is (? )? Is the natural number a 18 of b? The greatest common factor of a and b is (? ) the least common multiple of a and b is (? )? The natural number a is a factor of b, and the greatest common factor of a and b is (? ) the least common multiple of a and b is (? )? 26.9÷()=? () 10? =0.6=72(? )? = 9× 5 15+() 27. A wire is 6 meters long, so it takes 25 minutes? , there is still (? ), if you need 25? M, and (? )? 28. A rectangular object is 4 centimetres long, 3 centimetres wide and 2 centimetres high. If you cut it into two small cuboids, its surface area will increase by () square decimeter at most, and its volume will increase by (? ) cubic decimeter? 29. In a batch of parts, 10 is qualified, 1 is unqualified, and unqualified accounts for () of the total. Unit conversion: 100 minutes =? (? ) hours and 45 minutes = (? ) hours? 225 square centimeters = (? ) square meters (fill in the score)? 18 hour = (? ) days (fill in the score)? 45ml=()L (fill in the score)? When 68 points = () (fill in the score)? 32 points = (? ) day (fill in the score)? 1.032m3 = (? ) cubic decimeter = (? ) cubic centimeters? 1.032m3 = (? ) cubic meter () cubic decimeter? 2.05 liters = () cubic decimeter = (? ) milliliter? 2.05 liters = () cubic decimeter (? ) milliliter? Second, the simplest score of the judgment question is the score in which the numerator and denominator are prime numbers. ............................. (? ) The sum of all true fractions with a denominator of 8 is 2 ........................... (? ) The sum of all the simplest true fractions with a denominator of 8 is 2 ................................... (? The product of two different natural numbers must be a composite ..................... (? ) The sum of two different prime numbers must be a complex number .................... (? ) The numerator and denominator are prime numbers, and the score is called simplest fraction ........................ (? Both numerator and denominator are prime numbers, and the fraction must be the simplest fraction ..................... (? ) The parallelogram is an axisymmetric figure? Third, the calculation problem? 378? -? 14? +? 34? +? 18? 5- 16? +? 56? - 1

Fourth, answer questions? 1.？ Put 5g salt into 100g water? What is the percentage of salt in brine? What percentage of salt water is water? ? What is the salt content in the water? How many times more water than salt? ? 2.？ Make a big square with a small rectangular block with a length of 24cm and a width of 16cm. What is the minimum side length of a big square? How many small rectangular blocks do you need? ? 3.？ Use square floor tiles to lay a room with a length of 24m and a width of 27m. The floor tiles to be used are all one block. What is the maximum length of floor tiles that can be used? How many tiles do you want to use? 4. A cubic pen container, with the total length of sides of 36 cm and the surface area of (? ) 5 square centimeters. How many square decimetres of iron does it take to make a rectangular iron suitcase with a length of 40cm, a width of 30cm and a height of 20cm? If the weight of gasoline per liter is 0.82 kg, how many kilograms of gasoline can this iron box hold? 6. Master Wang made five parts in four hours, Li Shifu made 1 1 parts in nine hours, and Master Wang made (? ) Parts, it takes () hours for Li Shifu to make a part, and () it is finished quickly. 7.a is 35? , 14 more than b? What is the sum of Party A and Party B? ? 8.a is 35? , B is more than A 14? What is the sum of Party A and Party B? ? 9. The bridge pile was driven into the bottom of the river? M, water depth 12 14? Rice, above water, 25 12? M, how long is the bridge pile?