1、0.6= = 18÷( )=( ): 10=( )%
2. In proportion, the product of two external terms is 1, one of which is 2.5 and the other is ().
3. There are 25 white rabbits and 30 gray rabbits. The number of grey rabbits is the number of white rabbits. The number of white rabbits is less than that of grey rabbits, and the number of grey rabbits is ()% more than that of white rabbits.
In a few days, Sutong Bridge will be fully open to traffic. On the map with the scale of 1: 100000, it is measured that the length of the main bridge of Sutong Bridge is1.4cm, and the actual length of the main bridge of Sutong Bridge is () km.
5. Choose four numbers from the divisor of 12 to form the proportional formula ().
6. The radius of the bottom surface of the cylinder is 1 cm, the side surface is just square, and the volume of the cylinder is () cubic centimeters.
7, 28 people to participate in the table tennis competition, the elimination system, decide the champion, * * * play ().
8. If A equals B, the simplest integer ratio of A to B is (). If a is 30, then b is ().
9, 17, 13, 15, 15, 14, 15, 16, 15, mode
106,99, 104, 120, 107,12,33,102,97,/kloc.
10, if 3a=4b, then a: b = (): (), and a and b are in the ratio of ().
1 1, you can use () or () when there is no measuring tool or the measurement requirements are not very accurate.
12, a triangle, the ratio of three angles is 1: 1: 2, the three angles of this triangle are () degrees, () degrees and () degrees respectively, and this triangle is () triangle or () triangle.
13, a right triangle with a base length of 3 cm and a height of 2 cm, rotates around it with the height as the axis, and you will get a () body with a base diameter of () cm and a height of () cm, and its volume is () cubic cm.
14、 + + +…+ =( )
Second, think deeply and distinguish right from wrong. (5 points)
1, the fan chart can clearly show the relationship between partial quantity and total quantity. ……( )
The two related quantities must be in proportion. ………………………………………( )
3. The volume of a cylinder is larger than that of a cone with the same base height. ……………………( )
4. If AB = k+2 (k must be), then A and B are inversely proportional. ……………………………( )
5, the price of a commodity rises by 5% first, then by 5%, and the commodity price remains unchanged. ……………( )
Third, ponder and choose carefully. (5 points)
1, () can be proportional to:
① 3:4 ② 4:3 ③ 3: ④ :
2, the scale of 0 30 60 90 km, rewritten into a digital scale is ().
① 1:30 ② 1:900000 ③ 1:300000 ④
3. A rectangular iron sheet with a length of 25. 12 cm and a width of 18.84 cm can be used to make a cylindrical container with the largest volume. (unit; Cm)
①r= 1 ②d=3 ③r=4 ④d=6
4, the following statement is correct ().
Two formulas with equal ratios are called ratios. Two coprime numbers have no common divisor.
③ The numerator is definite, and the fractional value is proportional to the denominator; ④ The volume of the cone is equal to the volume of the cylinder.
5. 40% of the students in Class 6 (2) are girls, and 45% of the students in Class 6 (3) are girls. The number of girls in the two classes is equal. Then there is the number of people in Class 6 (2) () and Class 6 (3).
① Less than ② equals ③, and greater than ④ does not.
First, read carefully and fill in carefully. (25 points)
1、0.6= = 18÷(30 )=( 6): 10=( 60)%
2. In proportion, the product of two external terms is 1, one of which is 2.5 and the other is (0.4).
3. There are 25 white rabbits and 30 gray rabbits. The number of grey rabbits is 6/5 of that of white rabbits, the number of white rabbits is less than that of grey rabbits 1/6, and the number of grey rabbits is (20 )% more than that of white rabbits.
In a few days, Sutong Bridge will be fully open to traffic. On the map with the scale of 1: 100000, the length of the main bridge of Sutong Bridge is 1.4 cm, and the actual length of the main bridge of Sutong Bridge is (14) km.
5. Choose four numbers from the divisor 12 to form the proportional formula (1:2=6: 12).
6. The radius of the bottom surface of a cylinder is 1 cm, and the side surface is exactly square. The volume of a cylinder is (19.438+092) cubic centimeters.
7, 28 people to participate in table tennis competition, the elimination system, decided to champion, * * * play (28).
8. If A equals B, the simplest integer ratio of A to B is (). If a is 30, then b is ().
9, 17, 13, 15, 15, 14, 15, 16, and 15 have the following patterns.
106,99, 104, 120, 107,12,33,102,97,/kloc.
10, if 3a=4b, then a: b = (4): (3), and a and b are in (positive) proportion.
1 1, you can use (step-by-step measurement) or (visual inspection) when there is no measuring tool or the measurement requirements are not very accurate.
12, a triangle, the ratio of three angles is 1: 1: 2, the three angles of this triangle are (45) degrees, (45) degrees and (90) degrees respectively, and this triangle is an (isosceles) triangle or a (right-angled) triangle.
13, a right triangle with a base length of 3cm and a height of 2cm, will get a (cone) with a base diameter of 6cm and a height of 2cm, and its volume is (18.84) cubic cm.
14、 + + +…+ =( )
Second, think deeply and distinguish right from wrong. (5 points)
1, the fan chart can clearly show the relationship between partial quantity and total quantity. ..... (right)
The two related quantities must be in proportion. ........................................ (error)
3. The volume of a cylinder is larger than that of a cone with the same base height. ...................... (2 times)
4. If AB = k+2 (k must be), then A and B are inversely proportional. ............................................... (right)
5, the price of a commodity rises by 5% first, then by 5%, and the commodity price remains unchanged. ......................... (error)
Third, ponder and choose carefully. (5 points)
1, () can be proportional to:
① 3:4 ② 4:3 ③ 3: ④ :
2. Rewrite the scale of 0 30 60 90km to the digital scale of (1:3000000).
① 1:30 ② 1:900000 ③ 1:300000 ④
3. A rectangular iron sheet with a length of 25. 12 cm and a width of 18.84 cm can be made into a cylindrical container with the largest volume by using the circular iron sheet (③) below. (unit; Cm)
①r= 1 ②d=3 ③r=4 ④d=6
The following statement is correct (①).
Two formulas with equal ratios are called ratios. Two coprime numbers have no common divisor.
③ The numerator is definite, and the fractional value is proportional to the denominator; ④ The volume of the cone is equal to the volume of the cylinder.
5. 40% of the students in Class 6 (2) are girls, and 45% of the students in Class 6 (3) are girls. The number of girls in the two classes is equal. Then the number of six (2) classes (③) the number of six (3) classes.
Wish you success!