Question

Решите задачу разными способами. в заголовке стенгазеты 4 красные и 8 синих букв. три буквы стерли. сколько букв осталось в заголовке?

Answer 1

1)4+8=12б всего было
2)12-3=9б осталось

1)4-3=1б осталась красная
2)1+8=9б осталось всего


1)8-3=5б осталось синих
2)5+4=9б осталось всего

Answer 2

1)4+8=12(б.)-всего в стенгазете 2)12-3=9(б.) Ответ:в стенгазеты осталось 9 букв

Answer 3

Problem Analysis

In the given problem, we have a newspaper headline with 4 red letters and 8 blue letters. Three letters have been erased, and we need to determine how many letters are left in the headline.

Solution 1: Counting the Remaining Letters

To solve this problem, we can count the remaining letters in the headline.

The headline originally had 4 red letters and 8 blue letters, totaling 12 letters. Three letters have been erased, so we subtract 3 from the total number of letters to find the remaining letters.

Therefore, the headline has 9 letters remaining.

Solution 2: Using Algebra

Another way to solve this problem is by using algebra.

Let's represent the number of red letters as 'r' and the number of blue letters as 'b'. We are given that r = 4 and b = 8.

The total number of letters in the headline is the sum of the red and blue letters: r + b = 4 + 8 = 12.

Since three letters have been erased, we subtract 3 from the total number of letters to find the remaining letters: 12 - 3 = 9.

Therefore, the headline has 9 letters remaining.

Solution 3: Using Python Code

We can also solve this problem using a simple Python code snippet. Here's an example:

red_letters = 4
blue_letters = 8
erased_letters = 3

remaining_letters = red_letters + blue_letters - erased_letters

print("The headline has", remaining_letters, "letters remaining.")

When we run this code, it will output: ``` The headline has 9 letters remaining. ```

This confirms that the headline has 9 letters remaining.

Conclusion

In conclusion, the headline originally had 4 red letters and 8 blue letters. After erasing three letters, there are 9 letters remaining in the headline. This can be determined by counting the remaining letters, using algebra, or by using a simple Python code snippet.