Question

90*8-42:(50786-50780)*9 4200:14+4506-81:27 7*6+64:8*(23-19)+30008

Answer 1

90*8-42:(50786-50780)*9= 720-42: 6*9= 720-7*9=720-63=657

4200:14+4506-81:27=300+4506-3=4803

7*6+64:8*(23-19)+30008=42+64:32+30008=42+2+30008=30052

Answer 2

а) 657

1. 90 *8 =720

2. выполняем действие в скобках: 50786-50780=6

3. 42:6=7

4. 7*9=63

5. 720-63=657

далее аналогично

б) 4803

в) 30082

Answer 3

Let's solve each expression step by step:

1. 90 * 8 - 42 : (50786 - 50780) * 9

Step 1: Calculate the expression inside the parentheses. 50786 - 50780 = 6

Step 2: Divide 42 by the result from Step 1. 42 ÷ 6 = 7

Step 3: Calculate 90 multiplied by 8. 90 * 8 = 720

Step 4: Multiply the result from Step 2 by 9. 7 * 9 = 63

Finally, subtract the result from Step 4 from the result from Step 3: 720 - 63 = 657

Answer: 657

2. 4200 : 14 + 4506 - 81 : 27

Step 1: Divide 4200 by 14. 4200 ÷ 14 = 300

Step 2: Divide 81 by 27. 81 ÷ 27 = 3

Step 3: Add the result from Step 1 to 4506. 300 + 4506 = 4806

Step 4: Subtract the result from Step 2 from the result from Step 3. 4806 - 3 = 4803

Answer: 4803

3. 7 * 6 + 64 : 8 * (23 - 19) + 30008

Step 1: Calculate the expression inside the parentheses. 23 - 19 = 4

Step 2: Divide 64 by 8. 64 ÷ 8 = 8

Step 3: Multiply 7 by 6. 7 * 6 = 42

Step 4: Multiply the result from Step 2 by the result from Step 1. 8 * 4 = 32

Step 5: Add the result from Step 3 to the result from Step 4. 42 + 32 = 74

Step 6: Add 30008 to the result from Step 5. 74 + 30008 = 30082

Answer: 30082

So, the solutions to the given expressions are:

1. 657
2. 4803
3. 30082