Question

Для украшения класса к новому году ребята мастерили снежинки, елочки и фонарики. фонариков сделали на 12 больше, чем елочек, а снежинок в 3 раза больше, чем елочек. Сколько всего украшений сделано, если среди них 9 елочек? сколько обратных задач можно составить к этой задаче?

Answer 1

9*3=27 снежинок
9+12=21 фонариков
27+21+9=57 всего игрушек
 Можно составить еще две задачи, если знать сколько снежинок и фонариков!!!!

Answer 2

1)12+9=21(ф)-фонарик
2)9•3=27(с)-снежинок

Answer 3

Problem Statement

The students made decorations for their classroom for the New Year. They crafted snowflakes, Christmas trees, and lanterns. There were 12 more lanterns than Christmas trees, and there were 3 times as many snowflakes as Christmas trees. If there were 9 Christmas trees, how many decorations were made in total? Also, how many reverse problems can be created based on this task?

Solution

To find the total number of decorations made, we need to calculate the number of lanterns and snowflakes, and then add them to the number of Christmas trees.

Let's start with the number of lanterns. We know that there were 12 more lanterns than Christmas trees. Since there were 9 Christmas trees, we can calculate the number of lanterns as follows:

Number of lanterns = Number of Christmas trees + 12 = 9 + 12 = 21

Next, let's calculate the number of snowflakes. We know that there were 3 times as many snowflakes as Christmas trees. Since there were 9 Christmas trees, we can calculate the number of snowflakes as follows:

Number of snowflakes = Number of Christmas trees * 3 = 9 * 3 = 27

Finally, to find the total number of decorations, we add the number of Christmas trees, lanterns, and snowflakes:

Total number of decorations = Number of Christmas trees + Number of lanterns + Number of snowflakes = 9 + 21 + 27 = 57

Therefore, a total of 57 decorations were made for the classroom.

Reverse Problems

A reverse problem is a problem that can be created based on the given task. In this case, we can create reverse problems by changing the values of the given variables and asking questions related to them.

For example, we can ask: - If there were 15 Christmas trees, how many decorations would be made in total? - If there were 30 lanterns, how many Christmas trees would there be? - If there were 10 snowflakes, how many lanterns would there be?

By changing the values and asking different questions, we can create multiple reverse problems based on this task.

In conclusion, a total of 57 decorations were made for the classroom. Additionally, multiple reverse problems can be created by changing the values of the given variables and asking related questions.