Question

1)(1 3/5+1,8)*1/2= 2)(6-4 8/15)*2,2= 3)(1,25+1/6)*2,4= помогите пожалуйста

Answer 1

1)  (1 3/5 + 1,8) * 1/2 = (1,6 + 1,8) * 0,5 = 1,7

2)  (6 - 4 8/15) * 2,2 = 1 7/15 * 2,2 = 22/15 * 22/10 = 242/75 = 3 17/75
Скорее всего после скобок стоит знак деления, тогда решаем так:
(6 - 4 8/15) : 2,2 = 1 7/15 : 22/10 = 22/15 * 10/22 = 10/15 = 2/3 

3)  (1,25 + 1/6) * 2,4 = 1,25 * 2,4 + 1/6 * 24/10 = 3 + 4/10 = 3,4 

Answer 2

Calculation 1: (1+3/5+1.8)*1/2

To solve this calculation, we can follow the order of operations (PEMDAS/BODMAS) which states that we should perform operations inside parentheses first, then any exponents, followed by multiplication and division from left to right, and finally addition and subtraction from left to right.

Let's break down the calculation step by step:

1. Inside the parentheses, we have 1 + 3/5 + 1.8. 2. We can simplify the addition of 1 and 1.8 to get 2.8. 3. Next, we need to add 3/5 to 2.8. To add fractions, we need a common denominator. The common denominator for 5 and 1 is 5. So, we can rewrite 3/5 as 3/5 * 1/1, which is equal to 3/5. 4. Now, we can add 2.8 and 3/5. To add a decimal and a fraction, we need to convert the decimal to a fraction. 2.8 can be written as 2 8/10, which simplifies to 2 4/5. Adding 2 4/5 and 3/5 gives us 2 7/5. 5. Finally, we need to multiply the result by 1/2. Multiplying a mixed number by a fraction can be done by multiplying the whole number part separately and then adding the product to the product of the fraction part. In this case, 2 * 1/2 = 1, and 7/5 * 1/2 = 7/10. Adding 1 and 7/10 gives us the final result of 1 7/10.

Therefore, the solution to the calculation (1+3/5+1.8)*1/2 is 1 7/10.

Calculation 2: (6-4+8/15)*2.2

Let's solve this calculation step by step:

1. Inside the parentheses, we have 6 - 4 + 8/15. 2. We can subtract 4 from 6 to get 2. 3. Next, we need to add 8/15 to 2. To add fractions, we need a common denominator. The common denominator for 15 and 1 is 15. So, we can rewrite 8/15 as 8/15 * 1/1, which is equal to 8/15. 4. Now, we can add 2 and 8/15. To add a whole number and a fraction, we need to convert the whole number to a fraction. 2 can be written as 2/1. Adding 2/1 and 8/15 gives us (2*15 + 8)/15 = 38/15. 5. Finally, we need to multiply the result by 2.2. Multiplying a fraction by a decimal can be done by multiplying the numerator by the decimal and keeping the denominator the same. In this case, (38/15) * 2.2 = (38*2.2)/15 = 83.6/15. 6. The result, 83.6/15, cannot be simplified further.

Therefore, the solution to the calculation (6-4+8/15)*2.2 is 83.6/15.

Calculation 3: (1.25+1/6)*2.4

Let's solve this calculation step by step:

1. Inside the parentheses, we have 1.25 + 1/6. 2. We can add 1.25 and 1/6. To add a decimal and a fraction, we need to convert the decimal to a fraction. 1.25 can be written as 1 25/100, which simplifies to 1 1/4. Adding 1 1/4 and 1/6 gives us (1*6 + 1)/4 = 7/4. 3. Finally, we need to multiply the result by 2.4. Multiplying a fraction by a decimal can be done by multiplying the numerator by the decimal and keeping the denominator the same. In this case, (7/4) * 2.4 = (7*2.4)/4 = 16.8/4. 4. The result, 16.8/4, can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 0.8. Dividing 16.8 by 0.8 gives us 21, and dividing 4 by 0.8 gives us 5. Therefore, the simplified result is 21/5.

Therefore, the solution to the calculation (1.25+1/6)*2.4 is 21/5.

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