Question

( 45-20)-(15-5) 89-10+(20-10)

Answer 1

25-10=15
79+10=89

или

25-10*79+10= 25-790+10= -755

Answer 2

Let's solve the given mathematical expression step by step:

Step 1: (45 - 20) - (15 - 5) Start by solving the innermost parentheses first: (45 - 20) = 25 (15 - 5) = 10 Now substitute the results back into the original expression: 25 - 10 = 15

Step 2: 89 - 10 + (20 - 10) Again, solve the innermost parentheses first: (20 - 10) = 10 Now substitute the result back into the original expression: 89 - 10 + 10 = 89

Now, we have two separate results:

Result of (45 - 20) - (15 - 5) = 15 Result of 89 - 10 + (20 - 10) = 89

So the final answer to the expression is:

15 - 89