Question

№1. (1 1/2 + 2 2/3 + 3 3/4) * 3 4/5 * (14 - 15 1/8 : 2 1/5) №2 сауле решила помочь маме. она 1/4 ч мыла посуду, 2/3 ч подметала пол в квартире. на уборку своей комнаты она затратила в 1,5 раза больше времени , чем на подметание пола. сколько всего времени Сауле помогла маме? Ответ в часах и минутах ПОМОГИТЕ РЕШИТЬ ПОЖААЛУЙСТА СРОЧНО НАДО. ЗАРАНЕЕ СПАСИБО

Answer 1

1.-34, 5 2. 67, 8. У меня получилось так. Тебе на завтра? 

Answer 2

№1. To solve the expression (1 + 1/2 + 2 + 2/3 + 3 + 3/4) * 3 + 4/5 * (14 - 15 1/8 : 2 1/5), we can follow the order of operations (PEMDAS/BODMAS).

1. First, let's simplify the division inside the parentheses: 15 1/8 : 2 1/5. To divide mixed numbers, we need to convert them into improper fractions.

- 15 1/8 = (15 * 8 + 1) / 8 = 121/8 - 2 1/5 = (2 * 5 + 1) / 5 = 11/5

So, 15 1/8 : 2 1/5 = 121/8 : 11/5.

2. To divide fractions, we multiply the first fraction by the reciprocal of the second fraction.

- 121/8 : 11/5 = 121/8 * 5/11 = (121 * 5) / (8 * 11) = 605/88

3. Now, let's substitute the simplified value back into the expression: (1 + 1/2 + 2 + 2/3 + 3 + 3/4) * 3 + 4/5 * (605/88).

4. Next, let's simplify the addition and multiplication inside the parentheses:

- 1 + 1/2 = 3/2 - 2/3 + 3 = 11/3 - 3/4 = 3/4

So, the expression becomes: (3/2 + 11/3 + 11/3 + 3/4) * 3 + 4/5 * (605/88).

5. Now, let's simplify the addition and multiplication outside the parentheses:

- 3/2 + 11/3 + 11/3 + 3/4 = 9/2 + 22/3 + 3/4 = (9 * 6 + 22 * 8 + 3 * 6) / (2 * 6) = 54/12 + 176/12 + 18/12 = 248/12 = 62/3

So, the expression becomes: (62/3) * 3 + 4/5 * (605/88).

6. Finally, let's simplify the remaining multiplication and addition:

- (62/3) * 3 = (62 * 3) / 3 = 62 - 4/5 * (605/88) = (4 * 605) / (5 * 88) = 2420/440 = 121/22

So, the final result is: 62 + 121/22.

Therefore, the solution to the expression (1 + 1/2 + 2 + 2/3 + 3 + 3/4) * 3 + 4/5 * (14 - 15 1/8 : 2 1/5) is 62 + 121/22.

№2. To find out how much time Saul helped her mother, we need to add up the time she spent washing dishes, sweeping the floor, and cleaning her room.

1. Saul spent 1/4 of an hour (15 minutes) washing dishes. 2. Saul spent 2/3 of an hour (40 minutes) sweeping the floor. 3. Saul spent 1.5 times more time cleaning her room than sweeping the floor. Since she spent 40 minutes sweeping the floor, she spent 1.5 * 40 = 60 minutes cleaning her room.

To find the total time Saul helped her mother, we add up the time spent on each task:

15 minutes (washing dishes) + 40 minutes (sweeping the floor) + 60 minutes (cleaning her room) = 115 minutes.

Therefore, Saul helped her mother for a total of 1 hour and 55 minutes.