Question

Розв'язати 2 способами. Біля під'їзду стояло П машин. Поїхали спочатку А машин, а потом ще Б машин. Скільки машин залишилося?

Answer 1

1)П - А - Б
2)П - (А + Б)

Answer 2

Solving the Problem

To solve this problem, we can use two different methods.

Method 1: Subtraction We can solve this problem by subtracting the number of cars that left from the initial number of cars.

Method 2: Counting Alternatively, we can count the number of cars that are left after the first and second cars leave.

Method 1: Subtraction

To solve the problem using subtraction, we can subtract the number of cars that left from the initial number of cars. Let's denote the initial number of cars as "P", the number of cars that left first as "A", and the number of cars that left second as "B". The formula to calculate the number of cars left is: P - A - B = Number of cars left

Method 2: Counting

Using the counting method, we can keep track of the number of cars that are left after each car leaves. - Initially, there are "P" cars. - After the first car leaves, there are "P - 1" cars left. - After the second car leaves, there are "P - 2" cars left.

Conclusion

Using either method, we can determine the number of cars left after the first and second cars leave.