Question

(2,6+1 2/5)×(4-2 4/25)=

Answer 1

(2,6+1 2/5)×(4-2 4/25)=
=(2,6+1,4)×(4-2,16)=
=4×1,84=7,36
Ответ: 7,36

Answer 2

Let's break down the calculations step by step:

First, let's deal with the addition inside the first parentheses: 2 + 6 = 8 2/5 is already in its simplest form.

So, the first part becomes: 8 + 2 2/5

Next, let's calculate the mixed number: 2 2/5 = 2 + 2/5 = 12/5

So, the first part becomes: 8 + 12/5

Now, let's convert 8 to a fraction with a common denominator of 5: 8 = 8 * 5/5 = 40/5

Now, the first part becomes: 40/5 + 12/5 = 52/5

Moving on to the second parentheses: 4 - 2 = 2 2 4/25 is already in its simplest form.

So, the second part becomes: 2 - 2 4/25

Next, let's calculate the mixed number: 2 4/25 = 2 + 4/25 = 54/25

So, the second part becomes: 2 - 54/25

Now, let's convert 2 to a fraction with a common denominator of 25: 2 = 2 * 25/25 = 50/25

Now, the second part becomes: 50/25 - 54/25 = -4/25

Now, let's put it all together: (52/5) * (-4/25) = (52 * -4) / (5 * 25) = -208 / 125

So, the final result is -208/125.