Beijing normal university printing plate sixth grade mathematics book ratio comprehension examination questions.

The first volume of sixth grade mathematics in Jinzhou, Liaoning Province

Unit 4 "Understanding of Comparison" Test Questions and Answers

Class name score

Fill in the blanks. (20 points)

(1) After reading a book for 35 minutes, the ratio between reading and not reading is ().

(2) The ratio of 2 tons: 750 kilograms to the simplest integer is (), and the ratio is ().

(3) There are 50 students in one class, and 2 people are sick. The ratio of absenteeism to attendance is ().

(4) A project takes 6 days to complete, 10 days to complete. The ratio of working hours used by Party A and Party B is (), and the ratio of working efficiency of Party A and Party B is ().

(5) The degree ratio of the three internal angles of a triangle is 1: 1: 2, and this triangle is a triangle.

(6) The ratio of numbers A, B and C is 5: 4: 3. If the average of numbers B and C is 56, then the number A is ().

(7) a potion. The ratio of liquid medicine to water is 1: 200. There are 75 grams of liquid medicine now, so we need to add () grams of water.

(8) The ratio of boys to girls is 4: 5, and the number of boys is less than that of girls ()%.

(9) When reading a book, what you have read is 49 that you haven't read, and the ratio between those who haven't read and those who have read is ().

( 10)( )÷8=0.25=4( ) =20:( )。

Second, judge. Mark "√" in the brackets after the question, and mark "×" if it is wrong (10).

(1) The side length ratio of two squares is 1: 3, and its lateral area ratio is also 1: 3. ( )

(2) Team A and Team B each build a section of road, with Team A completing it in 10 and Team B completing it in 8 days. The working time ratio between Team A and Team B is 10:8, and the working efficiency ratio is also 10:8. ( )

(3) The ratio of number A to number B is 7: 4, and number A is 34 more than number B.. ( )

(4) Sawing a piece of wood into 10 segments, and each segment is 1 10 of the whole wood sawing time. ( )

(5) The ratio of the perimeter to the side length of a square is 4: 1. ( )

Third, choose. Fill the letters representing the correct answers in brackets (10).

(1) A number is 50% less than B number, and the ratio of A number to B number is ().

A.2:5 B.5:3 C. 1:2 D.3:5

(2) Take out 15 oil from barrel A and pour it into barrel B. At this time, the weights of the two barrels of oil are equal. The original weight ratio of oil in barrel A and barrel B is ().

Answer 6:5 and answer 5:3

C.4:5 D.7:5

(3) Divide 150 into three parts: A, B and C, where A is 30 and the ratio of B to C is 3: 5, then C is ().

A.75 B.35 C.45

(4) In brine, salt accounts for 1 10 of brine, and the ratio of salt to water is ().

a . 1 10 b . 19 c . 9 10d . 109

(5) The ratio of the sides of two cubes is 3: 5, and the ratio of their volumes is ()

A: 125

Fourth, simplify the following ratios. (12)

(1)56: 1524 (2)30 minutes: 1.5 hours

(3) 15t: 400kg (4) 0.875: 74

5. Find the ratio of the following ratios. (12)

(1) 9.6: 315 (2) 360kg: 0.45t.

(3)25 cm: 12 m (4)45 minutes: 23 hours

6. Answer the following questions. (36 points)

(1) The volume ratio of oxygen and nitrogen in the air is 21:78,660 cubic meters. How many cubic meters of oxygen and nitrogen are there in the air?

(2) According to the ratio of 2: 3: 4, the school distributed 360 seedlings to the students in grades 4, 5 and 6 for planting. How many trees are there in each grade?

(3) The weight ratio of three bags of grain A, B and C is 3: 4: 5. It is known that A, B and C weigh 700g. What is the weight of package C?

(4) The sum of the edges of a cuboid is 96 cm, and the ratio of length to width to height is 5: 4: 3. How big is it?

(5) The efficiency ratio of mentoring to processing a part is 5: 3. We start work at the same time in the morning and process 480 pieces in one day. How many pieces does the master process more than the apprentice?

(6) The school library purchased 294 extra-curricular books and decided to lend them to three classes in grade six, with 45 students in class one, 50 students in class two and 52 students in class three. How many books will each class borrow if it is allocated according to the number of students?

Reference answers and grading standards

1.***20 points, 2 points for each small question.

(1) 3: 2 (2) 8: 3 83 (3)1:24 (4) 3: 55: 3 (5) isosceles right triangle

(6)80 (7) 15000 (8)20% (9)9:4 ( 10)2 16 80

Second, *** 10, 2 points for each small question.

( 1)× (2)× (3)√ (4)× (5)√

Iii. * * *10, 2 points for each small question.

( 1)C (2)B (3)A (4)B (5)A

Four, * * * * 12 points, 3 points for each small question.

( 1)4:3 (2) 1:3 (3) 1:2 (4) 1:2

Five, * * * * 12 points, 3 points for each small question.

(1)3 (2)45 (or 0.8) (3) 12 (or 0.5) (4)98 or 1 18.