1. Dafeng machinery factory originally planned to produce 1800 machine tools within one year, and actually produced 480 machines in the first three months. According to this calculation, how many more units were produced than originally planned?

Monthly production: 480/3= 160 (unit)

Annual output:160x12 =1920 (units)

The number of production units in the whole year exceeded the original plan:1920-1800 =120 (units).

2. Pioneer fishing boats go out to sea to fish. In the first half of the month, it went out to sea 13 days, catching 825 tons, and in the second half of the month 14 days, it caught 876 tons. How many tons does this fishing boat catch on average every day?

(825+876)/(13+14) = 63 (ton)

Master Wang made 108 machine parts in 3 hours. According to this calculation, how many parts can he produce by working seven hours a day? (Use proportional solution)

3: 108=7:x

3x=756

x=252