The sixth grade mathematics first volume unit 6 test paper

First, fill in the blanks.

1.9 ∶( )= =( )? 32=

2. The ratio of blue part to circular area is (), and the ratio of red part to circular area is ().

3. The radius ratio of two circles is 3∶2, their perimeter ratio is (), the ratio of side length to perimeter of a square is (), and the ratio of surface area to bottom area of a cube is ().

4. The quotient of the number A divided by the number B is 0.8, and the simplest integer ratio of the number A to the number B is ().

5. Salt accounts for 25% of water, and the ratio of salt to brine is ().

6. There are more boys than girls, and the ratio of boys to girls is ().

7. There are as many boys as girls, and the ratio of boys to girls is ().

8. If A+b= and A: B = 3: 8, then B = ().

It is known that AB∶BC= 1∶4, and the ratio of the area of triangle ABD to triangle DBC is ().

10. A bag of flour, the mass ratio of eaten and left is 3: 5, leaving this bag of rice.

1 1.A: B =, then 2a: 2b = ().

12. The degree ratio of the three angles of a triangle is 1: 2: 3. The degree of the largest angle in this triangle is (), which is a triangle ().

13. The degree ratio of the top angle to the bottom angle of an isosceles triangle is 2: 5, and the number of the bottom angles of this triangle is ().

14. In a subtraction formula, the ratio of the minuend to the subtrahend is 8∶5, and the difference is 24 smaller than the subtrahend. This subtraction formula is ().

Second, multiple choice questions. (Put the serial number of the correct answer in brackets)

1. Sugar accounts for sugar water, so the mass ratio of sugar to water is ().

a . 1∶20 b . 1∶2 1 c . 1∶ 19

2. For a cup of sugar water, the ratio of sugar to water is 1: 16. After drinking half, the ratio of sugar to water is ().

a . 1∶8 b . 1∶ 16 c . 1∶32

The latter 3.3: 5 increases 10. To keep the ratio unchanged, the previous item of the ratio should be ().

A. Add10 b. Multiply 6 c. Add 6.

4. transfer the number of class a to class b, and the number of the two classes is equal. It turns out that the ratio of class B to class A is ().

A.5∶3 B.3∶5 C.4∶5

5. The ratio of the degrees of the three internal angles of a triangle is 3: 4: 5, which is a triangle.

A. acute angle B. right angle C. obtuse angle

Third, simplify the ratio.

3.5∶0. 15 ∶ 1∶

0.5∶2.5 80∶ 15 ∶35

Fourth, seek the proportion.

16∶20 2∶ 4.5∶6

∶ 120∶ 18 5∶0.25

Fifth, the operation problem.

The area of each small square below is 1 cm2. Draw a rectangle with a circumference of 28 cm and an aspect ratio of 5: 2 along the grid line.

Sixth, solve the problem.

1. Disinfecting alcohol is prepared from pure alcohol and distilled water, and the ratio of pure alcohol to distilled water is 3∶ 1.

How many milliliters of pure alcohol does (1) 1.5 liter of sterilized alcohol contain?

(2) How many milliliters of distilled water should be added to prepare disinfectant alcohol with 500 milliliters of pure alcohol?

(3) How many liters of disinfectant alcohol can be prepared from 8 liters of distilled water?

2. The work efficiency ratio of Party A and Party B is 2: 3. When Party B finished 48 parts, how many did Party A make?

The circumference of a rectangle is 40 decimeters, and the length-width ratio is 3: 2. What is the area of this rectangle?

4. Divide a cuboid 6 cm long, 5 cm wide and 4 cm high into three small cuboids according to the volume of 3: 2: 1. How many cubic centimeters is the volume of each small cuboid?

5. There are 4 10 students in a primary school, and the proportion of students in the lower, middle and high grades is 2 1: 12:8. How many students are there in the lower grades than in the middle grades?

6. For an isosceles triangle, the degree ratio of the base angle to the top angle is 1∶4, and what is the top angle?

7. A mixed candy is made of chocolate candy, fruit candy and milk candy in the ratio of 1: 3: 4.

(1) How many kilograms of chocolate candy, fruit candy and milk candy do you need to make120kg of this mixed candy?

(2) 30 kg of chocolate candy, 30 kg of fruit candy and 30 kg of milk candy. How many kilograms of chocolate candy are left after the fruit candy is used up? How many kilograms of toffee do I need?

8. The factory buys 120 tons of raw materials for production, which are first distributed to workshop C, and the rest are distributed to workshop A and workshop B according to the ratio of 3: 5. How many tons are allocated to workshop A and workshop B respectively?

Unit 6 Test Paper Answers

I.1.2412642.1:32: 3

3.3∶2 6∶ 1 4.4∶5

5. 1∶5 6.8∶5 7.25∶ 18 8.

9. 1∶4 10. 1 1. 12.90? Right angle 13.75?

14.96-60=36

Second,/kloc-0 1.C2.B3.C4.b5.a

Three. 70: 32: 34: 3 1: 5 16: 3 1: 40

Four. 8 20

5. Tip: The length of the rectangle is10cm, and the width is 4cm.

Six, 1. (1) 1.5 l = 1500ml1500? =1125ml

(2)500? = (ml) (3)8？ =32 (liter)