The answer to the first question on page 67.68 of the second volume of the fifth grade mathematics textbook published by People's Education Press:1÷ 2 =1(kg)1÷ 3 =1(kg) 3.
Question 2: 3 ÷ 4 = 3/4 (square meter) 3 ÷ 5 = 3/5 (square meter)
Question 3:1091079103251410001331000 53 (horizontal newspaper)
Question 4:1÷ 81= 865438+1in 0.
Question 5:115 =151.
Question 6:5 medium 1, 4 medium 1.
Question 7: Two thirds and three quarters.
Question 8: 5 ÷ 6 = 5 out of 6 questions
Question 9: 1 ÷ 5 = 1 in 5.
People's Education Publishing House, the fifth grade, the second volume of mathematics textbook Exercise 6 The answer is that if it is People's Education Publishing House, the answer is:
59.5 * 42.5 = 2528.75 (square centimeter)
59.5 * 80 = 4760 (square centimeter)
42.5 * 80 = 3400 (square centimeter)
(4760+3400)*2+2528.75
=8 160*2+2528.75
= 16320+2528.75
= 18848.75 (square centimeter)
18848.75m2 =1.884875m2.
1.884875 *1000 =1884.875 (m2)
Answer: To build 1000 units, at least 1884.875 square meters of cloth should be used.
You can ask me anything you can't! ~~~
Exercise 10 answer 1 In the fifth-grade mathematics textbook published by People's Education Press, the pictures can't be uploaded, so we can only say, ① The first one in the first row: the picture above. The first one in the second row: the second one on the left: in front.
The third: the fourth on the right: the back. The first one in the third row: below ② The first one in the first row: above. The first in the second row: the second in front: the third on the right: the fourth in the back: the left. The first one in the third row: below (blame me for not understanding)
2.3 cm = 0.3 m
v=abh
=0.3×36×20
= 10.8×20
=2 16m
=2 16 square
3. Length, width and high surface area volume
① 2cm 1cm 3cm 22cm？ 6cm？
② 4cm 2cm 6cm 88cm？ 48cm？
③ 8cm 4cm 12cm 352cm？ 384cm？
Change: the surface area is 4 times larger than the original, and the volume is 8 times larger than the original.
Law: When the length, width and height of a cuboid expand by a certain multiple, its surface area expands by one square time and its volume expands by one cubic time.
4.①v=abh
=3×4×3
= 12×3
=36cm？
②v=abh
=4×4×3
= 16×3
=48cm？
People's education edition, the sixth grade mathematics textbook always reviews the answers, and there are answers in the complete solution of primary school mathematics.
Go to the bookstore to find the answer to the second volume of the mathematics textbook for the first day of the People's Education Edition. All self-purchased books used to supplement textbooks contain answers from textbooks, such as complete answers from textbooks.
I'm also a junior. I can't hurt my paper. Generally, I just copy my classmates' suggestions and can visit my classmates.
The answer to the seventh question on page 77 of the second volume of the first mathematics textbook of People's Education Press: ∵B is 45°C in the west and south of A, and 15 in the east and south of A.
∴∠BAC=45+ 15=60
∴A is at 45 degrees north latitude at most.
At point B, C is 80 degrees east of north.
∴∠ABC=80-45=35
∴∠ACB= 180-35-60=85
The first figure in the sixth grade math textbook (100 page) is a parallelogram. If the base length is a and the height is b, the area is ab.
The second figure is a diamond. If the diagonal (the two diagonal lines of the diamond are equal in length) is a, the area is a 2.
The third figure is a right-angled trapezoid. If the base length is a, the base length is b, the height is c, and the area is (a+b)c/2.
The fourth figure is a circle and an isosceles trapezoid. Measure the lower bottom length A, upper bottom length B and height C of the isosceles trapezoid. The area of the isosceles trapezoid is (a+b)c/2, and the area of the circle is (π c 2)/4, so the total area is (a+b) c/2+(π c 2)/4.
The sixth grade mathematics textbook People's Education Edition, the application question 1, a rectangular pool, measured from the inside, is 6 meters long, 3 meters wide and 2 meters deep. The pool has been filled with water 0.5 meters deep, and only () cubic meters of water can be filled.
2. The sum of the sides of a cube is 48cm, the side length is () cm, the bottom area is () cm2, the surface area is () cm2, and the volume is () cm3.
3. Pour 90 liters of water into a rectangular pool with a length of 6 decimeters and a width of 5 decimeters, just filling the pool with a depth of () decimeters.
4. Saw a 3-meter-long cuboid wood into two sections to get two cuboids. If the surface area is increased by 6 square decimeters. It turns out that the volume of this kind of wood is () cubic decimeter.
5. A rectangular iron sheet 6 cm long and 5 cm wide. After cutting a square with a side length of 1 decimeter from each of the four corners, a rectangular water tank without a cover can be welded. The volume of this water tank is () liters.
6, according to the requirements with 0, 4, 5 three digits in a three-digit row. Let the number of permutations be a multiple of 2, and there are () permutation methods, the teacher's permutation number is a multiple of 5, there are () permutation methods, the permutation number is a multiple of 3, and there are () permutation methods.
7. The three consecutive odd numbers following 37 and all less than 37 are (), () and () respectively, and their sum is exactly three times that of (). The three consecutive natural numbers immediately after 18 are (), () and ().
8, a container, measured from the inside, the bottom is 8 cm, pour 5 12 cubic centimeters of water into the container, just full. This container is () centimeters deep.
9. The ethmoid bone is both a multiple of 15 and a multiple of 20. The minimum quantity is (). A number can be divisible by 16 and 20. The minimum quantity is ().
10, a cuboid wood, 3 meters long, and the cross section is a square with a circumference of 12 decimeter. The volume of this piece of wood is () cubic centimeters.
1 1, a number is not only a multiple of 8, but also a multiple of 12 and 16, and the minimum number is (); A number is about 4, divisible by 5, or a multiple of 3. The minimum quantity is ().
12, the largest three digits divisible by 2, 3 and 5 at the same time is (), and the smallest three digits is (); Choose three numbers from the four numbers of 0, 5, 8 and 1 to form a three-digit number divisible by 3, where the largest is () and the smallest is ().
13, the sum of three consecutive even numbers is 66, which are (), () and () respectively.
14, there are two natural numbers, both prime numbers and composite numbers. If the least common multiple of these two numbers is 72, then these two numbers are () and () respectively.
15. Divide 10 kg of sugar into five parts, with each part being () kg, each part being () kg and two parts being () kg.
16, write all the simplest true fractions with denominator of 8 (). Write the simplest false fraction () with all molecules as 10.
17. Divide the 4-meter-long wood into three sections on average, each section is () meters long and each section is full. The second part is full-length.
18, car a has already walked 2/7 of the whole journey from a to b, and the remaining distance is more than the whole journey.
19. A cuboid block with a length of 4 cm, a width of 3 cm and a height of 2 cm can be cut into () 1 cm cubes, which can be arranged in a row of () meters.
20. Make a 50 cm long wire into a cuboid with a length of 5 cm, a width of 4 cm and a height of 2 cm, with () cm left.
2 1, a rectangular iron sheet, 40 cm long and 30 cm wide. Cut a cube with a length of 5 cm from the four corners and make a box. The volume of this box is () ml.
22, cut an 8 cm long cube into two small cuboids, and the surface area increased by () square centimeters.
23. the natural number A+ 1=B, the least common multiple of a and b is (), and the greatest common divisor is ().
24.A=2×3×5, B=2×3×7, the least common multiple of A and B is (), and the greatest common divisor is ().
25. A ÷ 6 = B (both A and B are natural numbers), the least common multiple of A and B is (), and the greatest common divisor is ().
26. The greatest common divisor of numbers A and B is 12, the least common multiple is 144, the number A is 36, and the number B is ().
27. A cuboid block with a length of 4 cm, a width of 3 cm and a height of 2 cm can be cut into () cubes 1 cm, and these cubes can be arranged in a row of () meters.
28. If the circumference of the bottom of a cube is 8 cm, then its surface area is () square cm and its volume is () cubic cm.
29. The side length of a cube is 1 decimeter. Four such cubes are used to form a cuboid. The surface area of this cuboid is () square decimeter, or it may be () square decimeter.
30. The rectangle is 1.2 decimeter long, 1 decimeter wide and 0.8 decimeter high. It covers an area of () square decimeter at the maximum and () square decimeter at the minimum.
3 1. After a 50 cm long wire is made into a cuboid with a length of 8 meters, a width of 4 cm and a height of 2 cm, there is still () cm left.
32. Rectangular iron sheet, 40 cm long and 30 cm wide. Cut four squares with 5 cm sides and make a box. The volume of this box is () ml.
34. Use a cube with a length of 1 cm to make a larger cube, at least ().
35. A cuboid block with a length of 10 cm, a width of 6 cm and a height of 4 cm can be cut into cubes with a side length of 2 cm. (no loss)
36. There are two cubes, the big one and the small one. The side length of a big cube is three times that of a small cube, and its volume is () times that of a small cube.
37. Fill in the blanks
5 cm long, 0.6 decimeter long, 6.2 meters long.
4 cm wide and 4 m wide.
Height 2.5 cm 0.2 decimeter
The surface area is 59.8 square meters
Volume 0.048 cubic decimeter
38. Melt a cubic iron block with a side length of 1 decimeter into a cuboid iron block with a width of 4 cm and a height of 2 cm. The length of this iron sheet is () cm.
39. When an iron ball is immersed in a cuboid container with a length of 2.5 decimeters and a width of 1.8 decimeters, the water level will rise from 6 cm to 8 cm. The volume of this iron ball is () cubic decimeter.
40. The surface area of a cube is 54 square centimeters, the area of each side is () square decimeter, the side length is () decimeter, and the volume is () cubic decimeter.
4 1, cut the cube with a side length of 8 cm into two small cubes, and increase the surface area by () square cm.
42. After two cubes with a side length of 3 decimeters are spliced into a cuboid, the surface area is reduced by () square centimeters, and the surface area of this cuboid is () square decimeters.
43. A cube with a surface area of 150 square centimeter has a volume of () cubic centimeter.
44. The surface area of a cube is 72 square centimeters, and its area is () square centimeters.
45. Cut a cuboid with a surface area of 30 square centimeters into two identical cubes, each with a surface area of () cubic centimeters.
46. An irregular stone was immersed in a cuboid glass jar with a length and width of 15 cm, and the water surface rose by 2 cm. Then the volume of this stone is () cubic centimeters.
47. A cuboid cement brick, the bottom of which is a square with a side length of 5 decimeters and a thickness of 1.2 decimeters. If the weight of cement bricks per cubic decimeter is 2.2 kilograms, then the weight of each cement brick is about () kilograms.
The second volume of the third grade mathematics textbook published by People's Education Press has several units and ten units.