Question

5 х(30-7х3)[(50-18):(28:7)+81:9х7=

Answer 1

5·(30-7·3)·(50-18):(28:7)+81:9·7=423

1) 7·3=21

2) 30-21=9

3) 50-18=32

4) 28:7=4

5) 5·9=45

6) 45·32=1 440

7) 1 440:4=360

8) 81:9=9

9) 9·7=63

10) 360+63=423

Answer 2

Let's break down this expression step by step:

1. First, perform the calculations inside the innermost parentheses:

   30 - 7 * 3 = 30 - 21 = 9 (50 - 18) = 32 (28 / 7) = 4

2. Now, continue to simplify the expression:

   [(32 / 4) + 81] / (9 * 7)

3. Simplify the numerator first:

   (32 / 4) + 81 = 8 + 81 = 89

4. Now, simplify the denominator:

   9 * 7 = 63

5. Finally, divide the numerator by the denominator:

   89 / 63

You can leave the answer as a fraction (89/63) or convert it to a decimal:

89 / 63 ≈ 1.4126984 (rounded to seven decimal places)

So, the result of the expression is approximately 1.4126984.