1. I can put the correct answer in brackets in the PK competition. (2 points for each question, ***20 points)
1.×7 and 7× They are the same, but not the same.
2. Tons = Kg hours = minutes
Days = hours, kilometers = meters
The reciprocal of 3.2 is, and the reciprocal of 1.3 is.
4. Rewrite into two division formulas.
5. Rainy days make sunny days. "1" in days, and the days belong to it.
6. The division of two numbers is also called two numbers. A:b(b≠0) where ":"is called, the former term of this ratio is and the latter term is.
7.0.3: Enlarge the previous item 1 10 times. To keep the proportion unchanged, we should also use the latter term 1, which is based on the nature.
8. The areas of two triangles are equal, and the ratio of base length to height is 7:8.
9. It is known that the right picture is a right-angled trapezoid, A B.
∠ C is∠ D, ∠B is∠ C.
Twice, ∠B is the degree. Washington D.C.
There are 25 boys and 20 girls in class 10.6 (1). The ratio of girls to boys is, and the ratio of boys to the whole class is.
Second, I am an impartial judge who can accurately judge right and wrong. (5 points)
1.2m wire, with or without meters, the rest are the same length. ()
2. Two numbers whose product is 1 are reciprocal. ()
3.0 and 1 have no reciprocal. ()
4. Divide a number into n parts and find out what each part is. You can multiply it by this number. ()
5. The ratio of the three sides of the triangle is 5:6:7, and the circumference is 54 decimeters. The lengths of the three sides of this triangle are 15 decimeter, 18 decimeter and 2 1 decimeter respectively. ()
Happy ABC, I chose quickly and accurately. (2 points for each question, *** 10)
1. It takes 8 minutes to walk from school to Party A and 9 minutes to Party B, and the distance ratio between Party A and Party B per minute is ().
A.8:9 B.9:8 C.8
2.(A and B are not 0), A B. ()
A.> B.< C.=
3. Multiply by a number, and the product is, what is this number? The formula is: ()
A. BC
4.60 is equivalent to 80 ()
A. BC
5. The number less than is: ()
A. BC
Fourth, I am careful and earnest. I am an expert in calculation. (***38 points)
1. Direct calculation (2 points for each small question, *** 12 points)
0.8
2. Simplify the following ratios. (2 points for each question, ***8 points)
24:48 2.8:0.7 1:0.25
3. Calculate the topic and simply write down the main process. (3 points for each small question, *** 12 points)
36×( ) ( )×24 [ 1-( )]÷
4. Column calculation (3 points for each small question, ***6 points)
(1) It is known that the product of two factors is a factor 15. What is the other factor?
(2) What are the quotient of addition and division, sum, multiplication and product?
Five, solve the problem, I can do it. (***27 points)
1. Only column type is not counted (6 points)
The Young Pioneers Brigade repurchased 360 children's books, including science and technology books, literature and art books and comic books.
(1) How many books are there on science, technology and literature?
(2) How many more literature books are there than science books?
(3) How many comic books are there?
2. Solve mathematical problems in life (***2 1, 5 points for the fifth question, 4 points for other questions)
(1) The length and width of a cuboid are decimeters, and the height is width. What is the area of the smallest face of this cuboid?
(2) The cuboid has a total length of 96 cm, a height of 4 cm and an aspect ratio of 3: 2. What is the volume of this cuboid?
(3) The road construction team built a 10 km highway. On the first day, the whole length was built, and on the second day, the meter was built. How many kilometers are left?
(4) The school should dig an 80-meter-long sewer. 1/4 was dug on the first day, and 1/2 was dug on the second day. How many meters have you dug in two days? How many meters are left?
(5) The number of the experimental primary school art group belongs to the science and technology group, and the number of the science and technology group belongs to the sports group. There are 40 people in the art group and how many in the sports group?