Question

((3.86+4 3/25):2.1+10.2:8 1/2)×0.2

Answer 1

$((3,86+4\frac{3}{25}):2,1+10,2:8\frac{1}{2})*0,2=((3,86+4,12):2,1+10,2:8,5)*0,2=(7,98:2,1+10,2:8,5)*0,2=(3,8+1,2)*0,2=5*0,2=1$

Answer 2

Let's break down the expression step by step:

1. First, calculate the expression inside the parentheses: (3.86 + 4 3/25) = 3.86 + (4 + 3/25) = 3.86 + (100/25 + 3/25) = 3.86 + (103/25) = (3.86 * 25 + 103) / 25 = (96.5 + 103) / 25 = 199.5 / 25 = 7.98

2. Now, calculate the expression inside the second set of parentheses: (10.2 / 8 1/2) = 10.2 / (8 + 1/2) = 10.2 / (17/2) = (10.2 * 2) / 17 = 20.4 / 17 ≈ 1.2

3. Next, calculate the product of the two results obtained in steps 1 and 2: 7.98 * 1.2 ≈ 9.576

4. Finally, multiply the result from step 3 by 0.2: 9.576 * 0.2 = 1.9152

So, the final answer is approximately 1.9152.