A section of highway is planned to be completed in 10 months. If the workload of each month is the same, how many parts of the highway have been completed in 7 months? How much is left?

A section of highway is planned to be completed in 10 months. If the workload of each month is the same, how many parts of the highway have been completed in 7 months? How much is left?

A section of highway is planned to be completed in 10 months. If the workload of each month is the same, how many parts of the highway have been completed in 7 months? How much is left?
7 / 10 = 7 / 10 or 1 / 10x7 = 7 / 10
1-7 / 10 = 3 / 10 A: there are still three tenths left
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To build an expressway, the first engineering team needs 10 months to complete, and the second engineering team needs 15 months to complete. In order to open to traffic ahead of time, let the first two engineering teams work together~
To build an expressway, the first engineering team needs 10 months to complete, and the second engineering team needs 15 months to complete. In order to open to traffic ahead of time, first let the two engineering teams work together. Halfway through, the second engineering team will be transferred, and the remaining tasks will be finished by the first engineering team after five months. Q: This is several months ahead of the first engineering team's task. We need to use the equation to solve it

Let Party A and Party B cooperate for x months, [1 - (1 / 10 + 1 / 15) * x] / 5 = 1 / 10
X=3
So this is 10-5-3 ahead of a alone = 2

The machinery factory plans to produce 450 machine tools for the whole year, which is 1.2 times of the annual plan two months ahead of schedule. How many machine tools are actually produced per month

Do you want to calculate the average number of units produced in a year or in ten months? The average number in ten months is 52 units. If it is twelve months, it is 43.333 units