1. On a certain day, the evening temperature in Huangshan dropped by 9℃ from 3℃ above noon. On this day, the evening temperature in Huangshan ()

2. Arrange the following figures in descending order:—7.6—20.80.513.22.3—1.2.

The decimal unit of 3 and 2 is (), and the sum of these units () is the smallest composite number.

The decimal unit of 4.2 1 1 is (), and it has () such decimal units, plus () such decimal units is 1.

5. Xiaoli's study time is 6 hours every day, accounting for () of the whole day.

6. Divide the 4m-long wire into 9 segments on average, each segment accounts for () of the total length, and each segment is ().

7. Fill in the appropriate scores in the brackets.

4 decimeters = () meters 55 grams = () kilograms 100 minutes = () hours 5 hours = () days.

29 seconds = () minutes 17 angle = () yuan 353 kg = () tons.

8. Fill in the appropriate figures in the brackets. 34 =( ) 12 ( )4 = 1824 2849 =4( )

= = = =( )÷40 =( ) = = = = =

Molecules of 9 and 27 plus 6. To keep the size of this score unchanged, add () to the denominator.

10, score 4x, when x () is a true score, when x () is a false score.

1 1, Master Wang processes 25 parts in 20 minutes, with an average of () parts per minute, and it takes () minutes to process a part.

The days of 12 and 20 10 in the first quarter accounted for () of the whole year.

3kg of 13, 14 and 1kg of () are equal.

14, 34 oranges were eaten in a box, that is to say, () was taken as the unit of "1" and divided into () pieces on average, and such () pieces of oranges were eaten, from which () of the remaining box of sentences can be deduced.

2. Judgment: 1, and all false scores are greater than 1. ( )

2. Fractions with equal numerator and denominator are false fractions. ( )

3. False score is greater than true score. ( )

4. Positive numbers must be greater than negative numbers. ( )

5 and 6 are not positive numbers because there is no+sign before 9. ( )

Add 9 to the numerator of 6.34, so that the size of the fraction remains the same, and add 9 to the denominator. ( )

7. One object can be regarded as a whole, and many objects can also be regarded as a whole. ( )

8. Divide two cakes of the same size to four children equally, and each child gets 14 cake. ( )

9. A rope is folded in half three times in a row, and each short section is 13 of the total length. ( )

10, the numerator and denominator of the fraction are multiplied or divided by the same number at the same time, and the size of the fraction remains unchanged. ( )

1 1, numerator and denominator are fractions of prime numbers, which must be the simplest fraction. ( )

Third, 1, Xiao Qi bought 22 pencils and gave them to neighbors and children. What is the percentage of the total number of branches sent?

How many? What percentage of the total number of remaining branches?

2. The submarine is below sea level130m. A whale is 26 meters above it. What is a whale at sea level?

What position?

Mother frog caught 50 bugs and son frog caught 35 bugs. (1) The number of bugs caught by my son is female.

What is the score? (2) The mother catches more bugs than the son?

4. Xiaohong gets 6 paper cranes in 8 minutes, Xiaoming 1 1 minute and Xiaohua gets 6 paper cranes in 6 minutes.

Paper crane, how much can three students fold per minute on average? Who folds quickly?

5. A 4 kg watermelon is distributed to 7 people. How much does everyone eat on average? How much to eat

Kilogram?

6. The salesman put 5 kilograms of sugar into 12 bags on average. What percentage of the total goods does each bag account for? How many kilograms does each bag of sugar weigh?

7. When processing similar parts, Master Wang can process 50 pieces in 3 hours and Li Shifu can process 70 pieces in 4 hours. Which expert works efficiently?

8. When five children do manual work together, they need to divide a 2-meter-long wool into five sections on average. How long is each part? How much of the total length does each segment take?

9. Students planted a batch of saplings, 69 survived, and 13 did not survive. What percentage of the total number of saplings are survived?

10, there is a piece of cotton cloth 3 meters long, which can just make four children's pajamas of the same size. How much of this fabric will be used for each children's pajamas? How many meters of cloth is used for each children's pajamas?

1 1. The choir has 12 boys, 1 1 girls. How many times more boys than girls? What is the percentage of boys to girls?

12, a batch of grain can be transported six times by car. How much does this car transport each time? How many of these grains have been delivered five times?

13. In the final math paper, fill-in-the-blank questions account for 20 points, multiple-choice questions account for 15 points, and true questions account for 10 points.

Practice and operation questions account for 25 points, and problem solving accounts for 30 points. How many points does each part account for in the total score of mathematics test paper?

14. Put10g of sugar into 50g of water. How much sugar is in the syrup? How much water is in the sugar water?

15. Divide a packet of 2,000 grams of candy into 8 portions on average. How much is this packet of candy per serving? How much does each share weigh?

Kilogram?

16, a rope is cut 6 meters just to cut 13. How long is this rope?

17, one channel is 900 meters long, and the whole project takes 24 days to complete. What fraction of the total length is repaired every day on average? Average daily

How many meters?

18, Xiao Liang walked 3 kilometers in 30 minutes. What fraction of the distance does he walk every minute on average?

/kloc-Grade 0/9 and Grade 4 students planted 40 willows, including 23 poplars. Poplar and willow trees

How many parts of the total trees do trees occupy? Willow is a fraction of poplar.