Fill in the blanks
The product of 1 has () decimal places. 7.2×0.63.
The number of 2.71000,90.1,3 0.0 1 is ().
3. Move the decimal point of 3.964 three places to the right, and the decimal point is () times.
4.8.6×0.72=( )×7.2
5. Expand 0.836 into decimals. The decimal with one digit is (), and the decimal point is moved to ().
Second, simple calculation questions
1.2.4× 12.5=
2.9.43× 10 1=
3.3.4× 12.5+6.6× 12.5=
4.0. 125×9.3×0.8=
5.700×0.34×2.9=
Third, the calculation problem
1. Vertical calculation. 18.25× 34 =
2. Vertical calculation. 9.35× 4.2 =
3. Vertical calculation. 15.07× 9.8 =
4. Use vertical calculation. 7.02× 0.56 = (the number is reserved to two decimal places).
5.8 1.25×0.6×9.3
Fourth, the text narrative questions
What is the 4.5 times of 1? 38.62?
2. Enlarge the product of 7.2 and 9.5 by 30 times. What is the result?
What's the difference? 4.25 and 0.9 times 0.8?
The difference between a number and 4.8 is divided by 0.5, and the quotient is 36. What's this number? (Equation solving)
5.7.2 is 0.8 less than 2 times of a certain number. What is a number? (Equation solving)
Verb (abbreviation of verb) application problem
1. A hen eats an average of 0.3 kg of feed every day. According to this calculation, how many kilograms of feed do five hens need to eat a week?
2. The vegetable station put in cucumber 1.2 tons, the potatoes put in were 1.5 times that of cucumber, and the cabbages were 2.3 times that of potatoes. How many tons of cabbage did the vegetable station deliver?
3. There is a small square with a side length of 1.5 decimeter. If four small squares are used to make a big square, what is the area of this big square?
The playground of Xin Ming Primary School is 45.5 meters wide, which is half the length. What is the area of the playground?
5. Li Hong walked 273 meters around a rectangular flower bed. If he takes 420 steps, what is the average step size?
Xiaohua walked 490.5 meters from home to school. If her average stride is 0.75 meters, how many steps has she taken from home to school?
7. There are 1.2 hectares of parallelogram vegetable fields. Its height is 240 meters, and how many meters is its bottom?
8. Xinwei Machinery Factory plans to produce 10.5 million machine tools throughout the year, which is10/0 times the actual completion of the plan. According to this calculation, how many machine tools can be actually produced in the whole year? How many units have been overfulfilled?
9. Five masters can process 750 parts in three hours, so how many more parts can eight masters process in four hours?
10. The distance between Party A and Party B is 240 kilometers. Two cars, A and B, are driving in opposite directions at the same time. The speed of car A is 45 kilometers per hour, which is 4 kilometers less than that of car B. How many kilometers are the two cars apart after 2.5 hours?