1. Fill in the blanks (1-5 is 1, 6- 15 is 2, *** 25).

1.

2.

3. The germination rate is certain, and the ratio of the number of germinated seeds to the number of experimental seeds is ().

4.5÷7=( )? ( )=( )? Forty two.

5.

6. The product is constant, and the ratio of two factors is ().

7.

8. The work efficiency is certain, and the proportion of the total workload and working hours is ().

9. The quotient is fixed, and the ratio of dividend to divisor is ().

10. On a plan, the actual distance of 80m is represented by 5cm, and the scale of this map is ().

1 1.

12. The height of the cone is certain, and its volume is proportional to the bottom area ().

13. What is the ratio of boys to girls in Class Five (1)? 10, 22 boys and () girls are known.

14. The ratio of side length to area of a square.

15. It takes 6 hours for Party A and 8 hours for Party B to complete a project. The ratio of working hours between Party B and Party A is (), and the ratio of working efficiency between Party A and Party B is ().

Second, the calculation questions (1-5 4 points for each question, 6-7 5 points for each question, *** 30 points)

1.

2.

3.

4.

5.

6. Simplified ratio 18? 24

7.

Iii. Application questions (1-3, 7 points each, 4-6, 8 points each, *** 45 points)

1. On the scale of 1 On the 35000000 map, the railway from Beijing to Hangzhou was measured to be 4.7 cm long. How many kilometers is this railway actually?

2. A car goes to a place to perform a task. Depart at 10 in the morning and 1 drive at 120 km in the afternoon. At this speed, we can reach our destination at 3 pm. How many kilometers did the car travel when it reached its destination? (Answer in two ways)

The rectangular vegetable field is 96 meters in circumference and the ratio of length to width is 5:3. What is the area of this vegetable field?

4.

5. The granary needs 1000 sacks to hold 60 kilograms of grain. If each sack contains 1.5 kg, how many sacks can be saved? (solved by proportional method)

6. It took 3.5 days to build a dam with a length of140m to build 24.5m.. According to this calculation, how many days will it take? (solved by proportional method)

Four, the selection is (5 points)

qq7 18220307