Examination time: 90 minutes.

Topics one, two, three, four, five, six, seven, eight and nine (plus points)

score

Dear students, the final journey of wisdom is about to begin! As long as you carefully analyze every problem along the way, you will definitely get an unforgettable travel memory. Are you ready? Let's go!

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Let me fill in: (2 points for each question, *** 18 points. )

The reciprocal of 1 and 0.4 is (); The reciprocal of () is 1.

2.25% = = (): 20 = () (fill in decimal places)

3. Among 0.26, 725, 2.6% and 0.267, the largest number is () and the smallest number is ().

The ratio of 4 to 2 is (), and the simplest integer ratio is ().

5, 2 hours and 25 minutes = 3.5 tons/hour = () kg

6. The largest three digits are less than the smallest four digits ()%, and 1.2 is greater than its reciprocal ()%.

7. Wang Wei deposited 100 yuan in the bank, and actually got 1, 0 1.8 yuan one year later, with after-tax interest of () yuan.

8. Xiaohong read a 320-page book. On the first day, she read it The next day, she should start reading from page ().

9.6 1 Class and Class 62 subscribed to juvenile science in a ratio of 3: 4. Class 2 * * * subscribes to 49 copies, and Class 2 subscribes to ().

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Second, choice: (fill in the serial number of the correct answer in brackets) (65438+ 0 point for each question, ***4 points)

1, in "; ÷ ; × ; Among these four formulas, there are () formulas whose number is less than. ① 1 ② 2 ③ 3 ④ 4

2. The ratio of the circumference to the radius of a circle is ().

① Half radius ② Double radius ③ Pi ④ Double pi.

3. The scientific and technological team used 500 wheat seeds for germination test, and 20 of them did not germinate. The germination rate is ().

① 250% ② 3.85% ③ 96% ④ 4%

4, a rope cut into two sections, the first section is meters long, the second section is full length, then ().

① The first paragraph ② The second paragraph ③ The two paragraphs are the same length ④ Uncertain.

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Third, the judgment (the "x" in brackets is correct, and the "x" in brackets is wrong). ) (2 points for each question, ***8 points)

1. Of all the line segments with both ends on the circle, the longest is the diameter. ( )

The 2.3 kg one weighs as much as the 5 kg one. ( )

3. To convert 0.9% into decimal, just remove the percent sign. ( )

4. Put 10g salt into 10g water, and the ratio of salt to brine is1:1. ( )

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Four. Calculation: (***26 points)

1, write directly. (65438+ 0 points for each question, ***8 points)

4× = ÷ = + = ÷6=

7÷ = × = - = ÷ =

2. calculation. (3 points for each question, *** 12 points)

① + ÷ + ② × - ÷

③ 3 ×( + )- ④( + - )÷

3. Solve the equation. (3 points for each question, ***6 points)

① ÷ = + 1 ② 0.75 + × = 1

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Five, do the questions as required (6 points)

1. Draw a circle with a diameter of 3 cm. (2 points)

2. Calculate its perimeter and area. (4 points)

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Six, only comprehensive formula or equation, not calculation (2 points per question, ***6 points)

1, 25% of a number equals 36, what is this number?

2. One number is 25. What's its number?

It takes 5 hours for Xiaohong to finish typing a manuscript by herself. This manuscript was typed by others first, and the rest was given to Xiaohong. How many hours does it take to finish typing?

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Seven, according to the conditions of supplementary questions, and list the formula (3 points for each question, ***9 points).

A village built a 240-meter-long canal. On the first day, the full length will be built, and on the second day, the full length will be built. ? Please ask three different questions, and then list the formulas without calculation. )

① ? Column type

② ? Column type

③ ? Column type

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Eight, solve the problem (1 question 3 points, 2-5 questions each 5 points, ***23 points. )

1. The 25th of last month happened to be Xiaoxiao's birthday. Dad ordered a big cake. This cake is eaten by my mother, and those who eat it with a smile, those who eat it with my father, and the remaining grandparents share it equally. Who do you think eats the most cakes in their family of five? If you want to share the cake, how would you share it?

2. My mother gave Xiaoxiao a newly published Harry Potter and the Goblet of Fire as a birthday present. This book has 600 pages. What I read on the first day and the next day, do you know which page Shao Shao should start reading on the third day?

Regular annual interest rate

2.25% a year

2.43% in two years

3 years 2.70%

3. My grandparents gave Xiaoxiao 1000 yuan as a gift. Xiaoxiao deposited all the money sent by her grandparents in the bank for a fixed period of three years. After the expiration of the preparation period, all after-tax interest and principal will be donated to Project Hope. How much can I donate to "Project Hope" when Xiaoxiao expires? (Attached: Annual Interest Rate Table of Bank Time Deposit. )

In order to celebrate Xiaoxiao's birthday, Xiaoxiao's cousin, the naughty family, invited him to visit Guangdong Zoo in Guangzhou. At 17 o'clock on New Year's Day, Xiaoxiao's family of five drove from Shenzhen and the naughty family drove from Guangzhou at the same time. They plan to meet on the expressway from Shenzhen to Guangzhou and then go to the zoo together. The distance between Xiaoxiao and the naughty boy is150km, and the speed of the naughty boy family is 80km per hour, which is the speed of Xiaoxiao family.

At noon, Xiaoxiao and Naughty have lunch in the happy restaurant of the zoo. Xiaoxiao and Naughty found 24 tables in the dining room. There are two kinds of tables for four people and six people, among which the table for four people is a table for six people. Do you know how many tables for four and six are there in this restaurant?

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Nine, Ph.D. in Mathematics (additional questions, 10)

1. The distance from teacher Zhang's home to school is 3000 meters. At 7: 40, he rides his bike from home to school. The outer diameter of the wheels of this bicycle is 70 cm, and the average speed is 100 rpm. If school starts at eight o'clock, can Mr. Zhang get to school on time?

There is a row of colored balls hanging in the zoo. Xiaoxiao found that they were arranged in red, orange, blue, purple, green and yellow. Xiaoxiao counted them, * *118. Do you know what color the last colored ball is?