Question

На одном уроке ученики сделали 30 игрушек, а на другом 20 игрушек. Затем 10 игрушек они подарили малышам. Сколько игрушек осталось у учеников? Решить задачу разными способами

Answer 1

Первый способ: (30+20)-10=40 Второй способ 1) 30+20=50 2) 50-10=40

Answer 2

1 способ) 30+20=50, 50-10=40.  Ответ: у них осталось 40 игрушек
2 способ) (30+20)-10=40

Answer 3

Problem Analysis

We are given that students made 30 toys in one lesson and 20 toys in another lesson. Then, they gave away 10 toys to babies. We need to find out how many toys are left with the students.

Solution 1: Using Subtraction

We can solve this problem by subtracting the number of toys given away from the total number of toys made.

The total number of toys made is 30 + 20 = 50 toys. The number of toys given away is 10 toys.

To find the number of toys left with the students, we subtract the number of toys given away from the total number of toys made: 50 - 10 = 40 toys.

Therefore, there are 40 toys left with the students.

Solution 2: Using Addition and Subtraction

Another way to solve this problem is by adding the number of toys made and subtracting the number of toys given away.

The total number of toys made is 30 + 20 = 50 toys. The number of toys given away is 10 toys.

To find the number of toys left with the students, we can add the number of toys given away to the number of toys made and then subtract the number of toys given away: (30 + 20) - 10 = 50 - 10 = 40 toys.

Therefore, there are 40 toys left with the students.

Solution 3: Using Addition and Subtraction in a Different Order

We can also solve this problem by subtracting the number of toys given away from the sum of the number of toys made in each lesson.

The total number of toys made is 30 + 20 = 50 toys. The number of toys given away is 10 toys.

To find the number of toys left with the students, we subtract the number of toys given away from the sum of the number of toys made in each lesson: (30 - 10) + (20 - 10) = 20 + 10 = 30 toys.

Therefore, there are 30 toys left with the students.

Conclusion

In conclusion, there are different ways to solve this problem. Using subtraction, we find that there are 40 toys left with the students. Using addition and subtraction, we also find that there are 40 toys left with the students. Additionally, using a different order of addition and subtraction, we find that there are 30 toys left with the students.