Question

В хозяйстве было 20 тракторов.на одно поле отправили 9 из них,на другое- столько же,а остальные были в ремонте.сколько тракторов было в ремонте? РЕши задачу разными способами

Answer 1

9 на поле
9на поле
значит 9+9=18
20-18=2
2 трактора на ремонте

Answer 2

1) 9+9=18 -отправили на поля.
2) 20 - 18= 2- в ремонте
Ответ: 2 трактора в ремонте

Answer 3

Problem Analysis

We are given that there were 20 tractors in total. 9 of them were sent to one field, and the same number were sent to another field. The remaining tractors were in repair. We need to determine how many tractors were in repair.

Solution 1: Subtraction

We can solve this problem by subtracting the number of tractors sent to the fields from the total number of tractors. Let's calculate it step by step:

1. Total number of tractors: 20 2. Tractors sent to one field: 9 3. Tractors sent to another field: 9 4. Total tractors sent to fields: 9 + 9 = 18 5. Tractors in repair: Total number of tractors - Total tractors sent to fields = 20 - 18 = 2

Therefore, there were 2 tractors in repair.

Solution 2: Algebraic Equation

We can also solve this problem using algebraic equations. Let's assume the number of tractors in repair is 'x'. We can set up the following equation:

Total number of tractors - Tractors sent to fields = Tractors in repair

20 - (9 + 9) = x

20 - 18 = x

x = 2

Again, we find that there were 2 tractors in repair.

Solution 3: Visualization

We can visualize the problem using a diagram. Let's represent the tractors with circles and use shading to indicate the tractors in repair.

Total Tractors: 20

Tractors sent to Field 1: 9
Tractors sent to Field 2: 9

Tractors in Repair: ?

We can shade 9 circles to represent the tractors sent to Field 1, 9 circles for the tractors sent to Field 2, and leave 2 circles unshaded to represent the tractors in repair.

Total Tractors: 20

Tractors sent to Field 1: 9 (shaded)
Tractors sent to Field 2: 9 (shaded)

Tractors in Repair: 2 (unshaded)

Therefore, there were 2 tractors in repair.

Conclusion

In conclusion, there were 2 tractors in repair out of the total 20 tractors. This can be determined by subtracting the number of tractors sent to the fields from the total number of tractors, setting up an algebraic equation, or visualizing the problem.