Question

1) 3 - 7 + 9 - 2 - 8 + 4 2) 2 - 6 - 8 +7 - 9 + 3 ? 3) 1,8 - 3 - 4 + 6 1 + 2 ? 4) 2,5 - 5 + 3 + 9,5 - 6 9 *, ? 2​

Answer 1

Ответ:

1)будет =15

2)будет=11

3)будет=46

4)будето=3,1

Пошаговое объяснение:

3 возможно не прааильное

Answer 2

Ответ:

1)ответ:16-17=‐1

2)Ответ:12‐23=‐11

3)Ответ:64,8‐7=57,8

4)Ответ:45-11,9=33,1

Это всё правильно

Answer 3

Let's solve each of these arithmetic expressions step by step:

1. 3 - 7 + 9 - 2 - 8 + 4 = (3 - 7) + (9 - 2) - 8 + 4 = (-4) + (7) - 8 + 4 = 3 - 8 + 4 = -5 + 4 = -1

2. 2 - 6 - 8 + 7 - 9 + 3 = (2 - 6) - 8 + (7 - 9) + 3 = (-4) - 8 + (-2) + 3 = -4 - 8 - 2 + 3 = -12 - 2 + 3 = -14 + 3 = -11

3. 1.8 - 3 - 4 + 6.1 + 2 = (1.8 - 3) - 4 + (6.1 + 2) = (-1.2) - 4 + 8.1 = -1.2 - 4 + 8.1 = -5.2 + 8.1 = 2.9

4. 2.5 - 5 + 3 + 9.5 - 6 * 9 First, we need to perform the multiplication before the addition and subtraction: = 2.5 - 5 + 3 + 9.5 - (6 * 9) = 2.5 - 5 + 3 + 9.5 - 54

Now, perform the addition and subtraction: = (2.5 + 3 + 9.5) - 5 - 54 = 15 - 5 - 54 = 10 - 54 = -44

So, the answers to your expressions are:

1. -1
2. -11
3. 2.9
4. -44