The decimal point of a decimal, 1, is 0.64 after moving two places to the left, and this decimal point is (); If a decimal point moves three places to the right and it is 4020, then the original number is ().

2. The quotient of A ÷ B is 3.6. If A expands fourfold and B expands fourfold, then the current quotient is ().

3. In a subtraction formula, the subtraction is 7 times the difference, the minuend is 136, and the subtraction is ().

4. 0.86 kg = () g 4 hectares and 500 square meters = () hectares.

4.5 square decimeter = () square decimeter () square centimeter

9000 square meters = () hectares 7.2 square kilometers = () hectares = () square meters

5. fill in ">", "

3 kg, 50 g, 350 g, 405 cm, 4 m, 800,000 square meters, 8 square kilometers.

50 hectares (5 square kilometers) 505 square decimeters (5.5 square meters) 0.25 hours (20 minutes)

6, known as 46× 12 = 552, 4.6× 0. 12 = (), 5.52÷ 1 .2= ().

7 10 is () times that of 1.25, and 2.5 times that of () is 6.25.

The product of 8,2.04×1.03 has () digits, and the highest digit of the quotient of 6.27÷5.4 is () digits.

The business cycle decimal of 9,4 ÷11is (), and the three decimal places are (). 10, the following figures are arranged from small to large: 0.32,

( )

2. True or false: 5 points

1, 0.7 times the decimal, and the product must be less than 0.7. - ( )

2, 0.434434343 is a cyclic decimal. - ( )

3, a number is amplified by 1000 times, as long as three zeros are added at the end of this number. - ( )

4. Divide the quotient of two numbers by 7. If the dividend is enlarged by 10 times and the divisor is reduced by 10 times, the quotient is enlarged by 100 times. ————————————————————————————( )

5, 13.2× 1.8- 3.2× 1.8 =( 13.2-3.2)× 1.8————————( )

Third, multiple-choice questions: 5 points

1, the number equal to 1.04 is ().

A. 1.0 B， 1.0400； c， 1.4； d， 1.40

2. The number greater than 0.22 and less than 0.23 is ().

a，0； B, countless; c，9； d， 10

3, 19.95 accurate to one decimal place is (). a， 19.9； b，20.0； c，20； d， 19

4. Divider is reduced by 100 times, divisor is also reduced by 100 times, and the quotient is ().

A, reduced 100 times b, expanded 100 times c, unchanged d, reduced 10000 times.

5. Ten numbers from 0 to 9 can be used to form () three-digit numbers, and there are no duplicates.

a，645 B，646 C，647 D，648

Fourth, the calculation question: 27 points

1, number written directly: 5 points.

0.7×0.03= 1.0 1× 10= 0.24×0.2= 0.96÷0.4= 0.2×0.4=

0÷0.24= 1÷0.25= 0.36÷0. 12= 0.2÷0.05= 3.68×0=

2. Vertical calculation of column: 12.

7.2×6.25= 3.52÷5.5= 179.2÷64= 6.5×0.48=

30÷74 (decimal representation of business cycle) 7.04÷4.07 (quotient with two decimal places)

3. How to calculate the following question as simple as possible: 10.

①2.8×0.5+0.5×27.2 ② 1.25×64×0.25

③7.67-2.57-2.43 ④6. 1×0.98

5. Column calculation: 6 points

① How much is the difference between 4.3 and 1.6 smaller than their sum? ② Enlarge the difference between 19.2 and 6.3 by 50 times and divide it by 0.2. What is the result?

Six, application questions: 32 points.

1, 100 kg of peanuts can squeeze out 40 kg of oil. According to this calculation, how many kilograms of peanuts does it take to extract 240 kilograms of peanut oil? How many kilograms of oil can be extracted from 5 1 kg peanuts?

2. A parallelogram wheat field with a base of 600 meters and a height of 300 meters. How many hectares is it? If you harvest 6000 kilograms of wheat per hectare, can this wheat field receive 100 tons of wheat?

A building has five floors, and there are six families on each floor. If each household saves electricity on average 1.3 kwh, how many kwh does this building save every month?

There are two baskets of pears. The first basket weighs 68.95 kilograms, which is 3.5 times that of the second basket. How much do these two baskets of pears weigh?

Xiaohua came home from school. If he walks 3.5 kilometers per hour and arrives in 0.2 hours, if the walking speed accelerates to 4 kilometers per hour, how many hours will it take to get home? (Figures shall be kept to two decimal places)

6. In May Flower Shop, lily 10 per bouquet, the purchase price is 56 yuan per bouquet, and the retail price is 8.5 yuan per bouquet. One morning, the store sold 32 lilies. How much profit can it make?

7. A batch of cloth originally planned to make 600 sets of clothes, but because each set saved 0.4 meters, 50 sets were made. How many meters is this batch of cloth?

8, the average of a number five is 60. If one of the numbers is changed to 80, the average value becomes 70. What was the original number changed?

Seven, thinking: 8 points.

Fangfang * * * made 20 true and false questions, and got 2 points for one correct answer, 1 point for one wrong answer, and 28 points for Xiao Fang * * *. Q: How many questions did she answer correctly? How many questions did you answer wrong?