Question

B) 30 - 19,56 : (4,2+3,95)=?r) (2,6 - 1,04): 0,24.0,8=?​

Answer 1

Ответ:

в) 27,6

г) 5,2

Пошаговое объяснение:

Answer 2

Let's solve these mathematical expressions step by step:

B) 30 - 19.56 : (4.2 + 3.95)

Step 1: Calculate the expression inside the parentheses first: 4.2 + 3.95 = 8.15

Step 2: Divide 19.56 by the result from Step 1: 19.56 / 8.15 ≈ 2.39878 (rounded to 5 decimal places)

Step 3: Subtract the result from Step 2 from 30: 30 - 2.39878 ≈ 27.60122 (rounded to 5 decimal places)

So, the value of B) is approximately 27.60122.

Now, let's move on to the second expression:

r) (2.6 - 1.04) : (0.24 * 0.8)

Step 1: Subtract 1.04 from 2.6: 2.6 - 1.04 = 1.56

Step 2: Multiply 0.24 by 0.8: 0.24 * 0.8 = 0.192

Step 3: Divide the result from Step 1 by the result from Step 2: 1.56 / 0.192 ≈ 8.125

So, the value of r) is approximately 8.125.