First, oral calculation.

15÷0.25= 1.5×25 = 24×38 = 2.4+ 1.6=

5 12 ÷56 = 57 ×2 125 = 59 × 1.8= 2.5×0.4=

Fill in the blanks.

1, a number is 2 1, b number is 30, and a number is less than b number ()%.

2. There are 29 boys in grade five, more than girls 16%, and girls have ().

3,365,550,500 writing ().

4. A triangular vegetable field, with a side length ratio of 3: 4: 5 and a circumference of 84 meters, of which the shortest side length is () meters.

5. The ratio of the circumference to the diameter of a circle is ()

6, 3.6 hours = () when () points.

7. It takes 4 days for Party A to complete the same work alone, and 5 days for Party B. The efficiency of Party A is ()% of that of Party B.

8, sampling inspection of a commodity, there are 38 kinds of qualified, 2 kinds of unqualified, the qualified rate of this commodity is ()

9.78:1.75 The simplest integer ratio is (), and the ratio is ().

10, the hour hand of a wall clock is 5 cm long, and its tip has gone () cm a day and a night.

1 1. The base of the triangle is 4cm long and 2cm high. The ratio of the area of this triangle to the area of a parallelogram with the same base height is ().

12, 23 of a equals 34 of b, and the simplest integer ratio of a to b is ().

13, fill in the blanks with the five numbers given, and add the following passage to a reasonable and complete story, each number can only be used once.

12.5 100 62.5 37.5 5

Teacher Zhang spent () yuan to buy () a Xinhua Dictionary. The price of each dictionary was () yuan, the total price was () yuan, and finally () yuan was recovered.

Third, the judge.

1, because 3 ÷ 1.5 = 2, 3 can be divisible by 1.5. ……………………( )

2. Bar chart can not only represent quantity, but also represent the change of quantity. .............................................. () 3. The number of copies of China Youth Daily is directly proportional to the amount of money spent. …………( )

4. The diameter is the longest line segment in a circle. ………………………………………( )

5.A and B are natural numbers, because A ÷ 34 = B× 45, so A >；; B ...... ()

6, remove the zero after the decimal point, the size of the decimal point remains the same. ………………… ( )

Fourth, calculation.

4.67-(2.98+0.67) 73.8× 16-73.8×6 (45 + 14 )÷73 +7 10

( 1- 14 -5 12 )÷23 89 ×[ 37 ÷(23 + 17 )]

5. The figure below is a statistical picture of the world population growth. Please read the pictures carefully and fill in the blanks.

Compared with 1987, the world population has increased by ()%.

(2) It took (), () and () years for the world population to increase from 2 billion to 654.38+0 billion.

(3) What information can you get from the pictures?

Sixth, the application problem.

1, a typist typed a manuscript. On the first day, I typed 25% of the total, on the second day, I typed 40% of the total, and on the second day, I typed 6 more pages than on the first day. How many pages are there in this manuscript?

2. There are 540 boys in the school, 60 fewer than 56 girls. How many girls are there in the school?

3. Make a rectangular water tank (without cover) with iron sheet, 3 meters long, 0.8 meters wide and 0.5 meters high. How many square meters of iron does it take? (The number is reserved for the whole square meter, and an approximate value is obtained in one way. )

4. If the ticket for each park is 8 yuan, is it enough for a school to organize 97 students to go to the park?

It takes 2 hours for Xiaoming to ride his bike from home to the amusement park through the shopping center. How long can he save if he rides his bike directly from home to the amusement park at the same speed?

6. Draw a miniature of the following figure according to the ratio of 1:2.