Question

1,25+7,5×(3 2/3+2,5)-7/25 ÷0,05​

Answer 1

Ответ:

См. прикреплённый файл.

Answer 2

To calculate the expression 1.25 + 7.5 × (3 2/3 + 2.5) - 7/25 ÷ 0.05, you should follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders (i.e., powers and square roots, etc.), Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right).

1. First, let's deal with the operations inside the parentheses/brackets:

   3 2/3 + 2.5 = 11/3 + 2.5

2. Now, add the fractions and the decimal:

   11/3 + 2.5 = 11/3 + 7.5/3 = (11 + 7.5)/3 = 18.5/3

3. Now, multiply the result from step 2 by 7.5:

   7.5 × (18.5/3)

4. Divide 7/25 by 0.05:

   7/25 ÷ 0.05 = (7/25) / (5/100) = (7/25) / (1/20) = (7/25) * (20/1) = (7/25) * 20

5. Now, you can perform the multiplication and division:

   • For step 3: 7.5 × (18.5/3) = (7.5 * 18.5) / 3
   • For step 4: (7/25) * 20 = (7 * 20) / 25

6. Finally, perform the addition and subtraction:

   • 1.25 + (7.5 * 18.5) / 3 - (7 * 20) / 25

Now, calculate each part:

• 7.5 * 18.5 = 138.75
• (7 * 20) / 25 = 5.6

Now the expression becomes:

1.25 + (138.75 / 3) - 5.6

Now, calculate the division and addition:

• 138.75 / 3 = 46.25
• 1.25 + 46.25 - 5.6 = 42.9

So, the final result is 42.9.