Question

91 : 7 (39 +29) : 419 +17 . 3 - 4680 : 5(60 - 5) : 554 - 26 + 38 : 364 : 463 : (3 : 7)48:2 + 60: 278 :3240 : (80:2)(19.5-5): 30​

Answer 1

Ответ:

1)91:7=13;

2)(39+29):4=68:4=17;

3)не понятно

4)80:5=12;

5)(60-5):5=55:5=11;

6)54-26+38:3=16;

7)64:4=147;

8)не понятно.

9)48:2+60:2=54;

10)78:3=26;

11)240÷(80:2)=240:40=6;

12)не понятно

Answer 2

To solve this mathematical expression, 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). Let's break it down step by step:

1. First, we'll handle the parentheses and operations within them:

   (39 + 29) = 68 (60 - 5) = 55 (3 : 7) = 3/7 (80 : 2) = 40 (19.5 - 5) = 14.5

So the expression becomes:

91 : 7 + 68 : 419 + 17.3 - 4680 : 5 * 55 : 554 - 26 + 38 : 364 : 463 : (3/7) * 48 : 2 + 60 : 278 : 3240 : 40 * 14.5 : 30

2. Next, perform the divisions:

   91 / 7 = 13 68 / 419 ≈ 0.1621 4680 / 5 = 936 55 / 554 ≈ 0.0993 38 / 364 ≈ 0.1044 463 / (3/7) ≈ 1084.3333 48 / 2 = 24 60 / 278 ≈ 0.2158 3240 / 40 = 81 14.5 / 30 ≈ 0.4833

So the expression becomes:

13 + 0.1621 + 17.3 - 936 * 0.0993 + 0.1044 + 1084.3333 + 24 + 0.2158 + 81 * 0.4833

3. Now, perform the multiplications:

   936 * 0.0993 ≈ 92.9058 81 * 0.4833 ≈ 39.1413

So the expression becomes:

13 + 0.1621 + 17.3 - 92.9058 + 0.1044 + 1084.3333 + 24 + 0.2158 + 39.1413

4. Finally, perform the additions and subtractions:

   13 + 0.1621 + 17.3 - 92.9058 + 0.1044 + 1084.3333 + 24 + 0.2158 + 39.1413 ≈ 1084.2531

The result of the given expression is approximately 1084.2531.