Question

Решить задачу. На новогоднюю ёлку повесили 11 шаров, сосулек на 4 меньши, чем шаров, а шишек - столько , сколько шаров и сосулек вместе. Сколько шишек повесили на ёлку?

Answer 1

11-4=7 сосулек                                                                                                            11+7=18 шишек повесили на елку

Answer 2

11-4=7 сосулек
11+7=18 шишек

Answer 3

Problem Analysis

To solve this problem, we need to determine the number of pinecones (шишки) that were hung on the Christmas tree. We are given the following information: - 11 balls (шаров) were hung on the tree. - The number of icicles (сосулек) is 4 less than the number of balls. - The total number of icicles and balls is equal to the number of pinecones.

Let's denote the number of balls as B, the number of icicles as I, and the number of pinecones as P.

Solution

We can use the given information to set up the following equations: 1. The number of icicles is 4 less than the number of balls: I = B - 4. 2. The total number of icicles and balls is equal to the number of pinecones: I + B = P.

To find the number of pinecones, we can substitute the value of I from equation 1 into equation 2 and solve for P.

Calculation

Let's substitute the value of I from equation 1 into equation 2: (B - 4) + B = P.

Simplifying the equation: 2B - 4 = P.

Now, we know that the total number of balls is 11, so we can substitute B = 11 into the equation: 2(11) - 4 = P.

Simplifying further: 22 - 4 = P, 18 = P.

Therefore, the number of pinecones hung on the Christmas tree is 18.

Answer

The number of pinecones hung on the Christmas tree is 18.