Question

52 карандаша стоят 1565 рублей.Сколько стоят 17 таких карандашей?38 карандашей?2)Одна швея за неделю шьет 13 рубашек,а другая -8.Сколько рубашек сошьют две швеи за 4 недели?

Answer 1

1)

1565:52=30( с копейками)- один карандаш

30*17=510(рублей)- 17 карандашей

30*38=1140( рублей)- 38 карандашей

 

 

2)

13+8=21( рубашка)- первая и вторая

21*4=84( рубашки)- за 4 недели

Answer 2

Calculation 1: Cost of 17 pencils

To calculate the cost of 17 pencils, we can use the given information that 52 pencils cost 1565 rubles.

Let's set up a proportion to find the cost of 17 pencils:

52 pencils = 1565 rubles 17 pencils = ?

To solve this proportion, we can cross-multiply and divide:

52 * ? = 17 * 1565 ? = (17 * 1565) / 52

Now, let's calculate the cost of 17 pencils:

? = (17 * 1565) / 52 = 510.96 rubles

Therefore, 17 pencils cost approximately 510.96 rubles.

Calculation 2: Cost of 38 pencils

Similarly, to calculate the cost of 38 pencils, we can use the given information that 52 pencils cost 1565 rubles.

Let's set up a proportion to find the cost of 38 pencils:

52 pencils = 1565 rubles 38 pencils = ?

To solve this proportion, we can cross-multiply and divide:

52 * ? = 38 * 1565 ? = (38 * 1565) / 52

Now, let's calculate the cost of 38 pencils:

? = (38 * 1565) / 52 = 1139.23 rubles

Therefore, 38 pencils cost approximately 1139.23 rubles.

Calculation 3: Number of shirts sewn by two tailors in 4 weeks

To calculate the number of shirts sewn by two tailors in 4 weeks, we can use the given information that one tailor sews 13 shirts in a week and the other tailor sews 8 shirts in a week.

Let's find the total number of shirts sewn by both tailors in one week:

One tailor = 13 shirts/week Other tailor = 8 shirts/week

To find the total number of shirts sewn by both tailors in one week, we can add their individual outputs:

Total shirts in one week = 13 + 8 = 21 shirts/week

Now, let's find the total number of shirts sewn by both tailors in 4 weeks:

Total shirts in 4 weeks = 21 shirts/week * 4 weeks = 84 shirts

Therefore, the two tailors will sew a total of 84 shirts in 4 weeks.