1

、

Pesticide plant has produced a batch of pesticides, with the original planned daily output of 2.5 tons, which can be completed on schedule. As a result, the output was increased by 0.5 tons per day, and the task was completed in only 20 days, a few days ahead of schedule?

2. The four rice mills in the rice mill can mill 6.4 tons of rice in 2 hours, and now the same rice mill is added.

Please go to Taiwan Province.

mill rice

40

How many hours does it take per ton? (The number shall be kept to one decimal place)

Xiaohong's home is in the east of the school, and Xiaogang's home is in the west of the school. They walk from home to school at the same time. Xiaohong walks 60 meters per minute and Xiaogang walks 65 meters per minute. After walking for 3 minutes, Xiaohong arrived at school. Xiaogang is 55 meters away from the school. What is the distance between Xiaohong's house and Xiaogang's house?

Haikou Chemical Fertilizer Plant originally planned to produce 65,438+0,650 tons of chemical fertilizer. It has been in production for seven months, and the monthly output is 1.5 million tons. How many months will it take to finish the task at this speed?

5. Party A and Party B jointly excavate a canal with a length of178.5m.. Team A digs10.5m every day, while Team B digs 9.7m every day. How many meters are left when the two teams dig together?

6. The road team built a 48-kilometer-long highway, which was originally planned to be completed in 24 days, but it was actually completed four days ahead of schedule. How many meters are built more than planned every day?

7. The school sent back 4 tons of coal, which was burned in 7 days 1. 12 tons. How many days can this pile of coal burn? 9. Decimal addition and subtraction and integer addition and subtraction must be digitally aligned. ( )

8. The product of two factors is 1.3, where one factor is enlarged by 10 times and the other factor is reduced by 5 times, and this number is ().