Question

Решите задачи:1)Сшили 30 платьев,израсходовав на каждое 4 м шёлка.Столько же метров шёлка израсходовали на юбки.На каждую юбку пошло на 1 м 50 см меньше шёлка,чем на платье.Сколько юбок сшили?2)Сшили 40 пододеяльников,израсходовав на каждый 6 м ситца.Столько же метров ситца израсходовали на наволочки.На каждую наволучку пошло на 4 м 80 см меньше ситца,чем на пододеяльник.Сколько наволочек сшили?

Answer 1

   1)

30*4 = 120м шёлка

4м=400см

1м50см= 150см

400см-150см=250см=2м50см на каждую юбку

30м:2м50см=3000см:250см=12юбок

 

   2)

40*6=240м ситца

600см-480см=1м20см ситца на одну наволочку

2400см:120см=20наволочек

 

Answer 2

1)Сначала узнаем скоько метров израсходовали на платья : 

4*30=120м

Известно, что столько жэе израсходовали на юбки, но на каждую юбку пошло на 1,5м меньше, значит на каждую юбку они расходовали (4-1,5) м шелка.

4-1,5=2,5м - расходовали на каждую юбку.

Нам неизвестно кол-во юбок. обозначим его через х. Тогда х*2,5=120м. Отсюда выражаем х : 

х=120/2.5

х=48 - юбок сшили

 

2) Аналогично решеам. Сначала найдем сколько использовали ситца на пододеяльники : 

40*6=240м

Столько же пошло на наволочки... На 1 навлочоку пошло на 4м80см ситца меньше, чем на пододеяльники, посчитаем, сколько это будет : 

6м-4,8м=1.2м

 

Теперь посчитаем, сколько наволочек сшили : обозначим искомое кол-во юбок через х :

1.2*х=240м, выражаем отсюда х : 

х=240/1.2

х=200 - наволочек сшили.

Answer 3

Problem 1: Sewing Dresses and Skirts

To solve this problem, let's break it down step by step.

1. We know that 30 dresses were sewn, and each dress required 4 meters of silk. 2. We also know that the skirts required 1 meter and 50 centimeters less silk than the dresses.

Let's calculate the amount of silk used for the skirts:

1. The dresses required 4 meters of silk each. 2. The skirts required 1 meter and 50 centimeters less silk than the dresses.

To convert centimeters to meters, we divide the centimeters by 100. So, 50 centimeters is equal to 0.5 meters.

Therefore, the skirts required 3.5 meters of silk each.

Now, let's calculate the number of skirts that were sewn:

1. We know that the total number of dresses and skirts sewn is 30. 2. Let's assume the number of skirts sewn is 'x'.

The equation to solve this is:

Number of dresses + Number of skirts = Total number of dresses and skirts

30 + x = 30

By subtracting 30 from both sides of the equation, we get:

x = 0

This means that no skirts were sewn.

Therefore, the answer to problem 1 is that no skirts were sewn.

Problem 2: Sewing Duvet Covers and Pillowcases

Let's break down the problem step by step.

1. We know that 40 duvet covers were sewn, and each duvet cover required 6 meters of fabric. 2. We also know that the pillowcases required 4 meters and 80 centimeters less fabric than the duvet covers.

Let's calculate the amount of fabric used for the pillowcases:

1. The duvet covers required 6 meters of fabric each. 2. The pillowcases required 4 meters and 80 centimeters less fabric than the duvet covers.

To convert centimeters to meters, we divide the centimeters by 100. So, 80 centimeters is equal to 0.8 meters.

Therefore, the pillowcases required 5.2 meters of fabric each.

Now, let's calculate the number of pillowcases that were sewn:

1. We know that the total number of duvet covers and pillowcases sewn is 40. 2. Let's assume the number of pillowcases sewn is 'y'.

The equation to solve this is:

Number of duvet covers + Number of pillowcases = Total number of duvet covers and pillowcases

40 + y = 40

By subtracting 40 from both sides of the equation, we get:

y = 0

This means that no pillowcases were sewn.

Therefore, the answer to problem 2 is that no pillowcases were sewn.

I hope this helps! Let me know if you have any further questions.