Question

(8 370+30):10-9*(510-491)=?

Answer 1

$(8370 + 30) \div 10 - 9 \times (510 - 491) = 8400 \div 10 - 9 \times 19 = 840 - 171 = 669$

Answer 2

Let's solve the expression step-by-step:

1. First, perform the addition inside the parentheses: 8,370 + 30 = 8,400

2. Next, perform the subtraction inside the parentheses: 510 - 491 = 19

3. Now, perform the multiplication outside the parentheses: 9 * 19 = 171

4. Perform the division: 8,400 / 10 = 840

5. Finally, perform the subtraction: 840 - 171 = 669

So, the value of the expression (8,370 + 30) / 10 - 9 * (510 - 491) is 669.