Question

Решите выражения а).(91-83)×3:4+12:6-32:8+(27+15):7+8×5.........б)9×5-36:6:2-(38-23):5-(69-45):3×2+(43-34)×2.. помагите пожалуста.

Answer 1

А) 6+2-6+6+40=48
б) 45-3-3-16+18= 41

Answer 2

Calculation of Expression a)

To solve the expression a), let's break it down step by step:

(91-83)×3:4 + 12:6 - 32:8 + (27+15):7 + 8×5

1. Start by evaluating the parentheses: (91-83) = 8 and (27+15) = 42.

2. Next, perform the multiplications and divisions from left to right:

- 8 × 3 = 24 - 24 ÷ 4 = 6 - 12 ÷ 6 = 2 - 32 ÷ 8 = 4 - 42 ÷ 7 = 6 - 8 × 5 = 40

3. Finally, add and subtract the results from left to right:

- 6 + 6 = 12 - 12 - 4 = 8 - 8 + 40 = 48

Therefore, the value of expression a) is 48.

Calculation of Expression b)

To solve the expression b), let's break it down step by step:

9×5 - 36:6:2 - (38-23):5 - (69-45):3×2 + (43-34)×2

1. Start by evaluating the parentheses: (38-23) = 15 and (69-45) = 24.

2. Next, perform the divisions from left to right:

- 36 ÷ 6 = 6 - 6 ÷ 2 = 3 - 24 ÷ 3 = 8

3. Perform the multiplications and subtractions from left to right:

- 9 × 5 = 45 - 45 - 3 = 42 - 42 - 8 = 34

4. Finally, perform the additions and multiplications from left to right:

- 43 - 34 = 9 - 9 × 2 = 18 - 34 + 18 = 52

Therefore, the value of expression b) is 52.

I hope this helps! Let me know if you have any further questions.