1, the digits of 100000,10 and percentile of a number are all 6, and the rest digits are all 0. This decimal number is written as () and read as ().
2. Move the decimal point 3. 14 by two places to (), and expand it to () times.
7 in the integer part of 3.70.672 means (), and 7 in the decimal part means ().
The decimal part of the number has two digits. When rounding to one decimal place, the approximation is 5.0. The original minimum value of this number is (), and the maximum value is ().
5, 248200 change of use? Wan? The unit is () million. Rewrite 78560000 for use? Billion? The number of units is () billion. (Keep two decimal places)
6. An isosceles triangle with the top angle of 1 12 degrees and its two bottom angles of () degrees. In a triangle? A=40B=80？ ,? C=().
7. Use 4, 3, 0 and decimal point to form a maximum number () and a minimum decimal number ().
8, 0.930, 0.39, 0.903, 0.309, the largest is (), the smallest is ().
9, 6 meters 3 cm = () meters 4.04 square meters = () square decimeter 7.5 tons = () kilograms 58 kilometers 7 meters = () kilometers.
10, 20 tortoises and 56 legs. Among them are () cranes and () turtles.
Second, judge. (Yes, in brackets? , the typo in brackets? . ) (6 points)
1, multiply 0 by any number to get 0, and divide 0 by any number to get 0. ( )
2、35? (7? 3)=35? 7+35? 3。 ( )
3. A triangle with three sides of 4cm, 4cm and 8cm is an isosceles triangle. ( )
4, 7.05, 7.0599, with one decimal place reserved, all of which are 7.l. ()
5. If the dividend is greater than the divisor, the quotient must be greater than 1. ( )
6. Decimals greater than 0.4 and less than 0.6 are only 0.5. ( )
7. The meaning of decimal addition is exactly the same as that of integer addition. ( )
8. Decimal must be less than integer. ( )
9. Subtract 2 from the minuend and add 2 to the minuend, and the difference remains unchanged. ( )
10. If a triangle has two acute angles, it must be an acute triangle. ( )
1 1、57? The simple algorithm of 10 1 is 57? 100+57=5757。 ( )
12、a？ The product of b must be greater than a. ()
Third, multiple choice questions. Fill in the brackets with the serial number of the correct answer. ) (6 points)
1, and two triangles with acute angles of 60 degrees are ().
A, general triangle B, acute triangle C, obtuse triangle D, equilateral triangle
2. The following formula that can be easily calculated by the law of multiplication and distribution is ().
a 、( 125+90)？ 8 B、52？ 25? 4 C，7.6 X 1.25+2.4 D，(258 X 45) X 55
3. The numbers of the two formulas in the following group () are not equal.
a、25？ (200+4) and 25? 200+25? 4 B、36？ 20 1 and 36? 200+36°C、265？ 105? 265? 5 and 265? ( 105 15 5) D，25？ 174? 4 and 25? 4? 174
4. Don't look at the numbers below? Zero? The number of is ().
a、807. 17 B、270.05 C、400.6 1 D、30 1009
5. Which of the following figures? 0? Remove the constant size is ().
a、7055 B、7.05 C、70.55 D、7.550
6. There is a () decimal between1.1and l.3.
A, 1 1 B, 18 C, countless d, 19.
Fourth, calculation. (32 points)
1, oral calculation. (6 points)
675? 100= answer 125? 8= 0.896? 100= answer 5.68+ 16.57= answer 36.26-30.86= answer 5.6+2.7= answer 3.9+4.08= answer 9. 14- 1.43= answer 8? 125? 8= Answer 25? 5? 4= Answer 24? 5= Answer 265- 158-42= Answer
2. Calculate the following questions vertically and check them. (4 points)
10-3.06= answer 1 1.36+8.54= answer.
3. Calculate with decimals. (4 points)
5m 23cm+3m 5mm10kg-3kg 600g
4. Calculation of the following problems can be simplified. (12)
( 125+7)? 8= Answer 3200? 25? 4= Answer 3.27+6.4+2.73+4.6= Answer 25? 44= answer 6.45-0.58- 1.42= answer 12? (324-285)? 26= Answer
5, column calculation (6 points)
What is the sum of (1)54.6 minus 3 1.4 plus 6 divided by 96?
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(2) The sum of five times of a number 17.83 is 1 17.83. What's this number?
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Fifth, solve the problem. (6 points for each small question, ***36 points)
1, the school canteen bought five bags of rice in two packages, one small bag of 35kg and one large bag of105kg. * * * How many Jin of rice did you buy? How many kilograms is the big bag more than the small one?
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It takes Xiaohong 7 minutes to get to school by bike every day. She rides 155 meters per minute. Xiaoming walks 2800 meters from school to home every day. Who is closest to school, Xiaohong or Xiaoming? How many meters is it?
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The distance between Party A and Party B is 560 kilometers. One car travels from Party A to Party B at a speed of 48 kilometers per hour, and the other car travels from Party B to Party A at a speed of 32 kilometers per hour. How many kilometers apart are the two cars five hours after they leave the two places?
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4. The following are the scores of five judges when Xiaoli and Xiaole were in the dance competition.
The method of summarizing the scores is to remove a highest score and a lowest score, and the remaining scores are added and divided by a few, which is the final score of the player. Please calculate, Xiaoli and Xiaole finally scored, who is taller? How much higher?
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5. A dripping faucet wastes 0. 1 m3 of water every day.
① There are 100 such faucets in a community. How many cubic meters of water is wasted in a month? (Calculated by 30 days in a month)
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How many cubic meters of water was wasted in this community in 2005?
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③ A place in Ningxia Hui Autonomous Region is seriously short of water. Every 65,438+000 households only use 2 cubic meters of water every day. How many households in Ningxia Hui Autonomous Region can use the wasted water in this community every day?
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6. Has the zoo been launched? A day trip? Activity price of two schemes:
Option 1: 150 yuan/adult; Every child, 60 yuan,
Scheme 2: More than 5 people (including 5 people), each person 100 yuan.
Now there are four adults and six children to play. Think about how to buy tickets to save money.
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