Question

12+(20+30)-2 4+6+(45-5) 65-30+(20-10) (97-7)-(35-5)

Answer 1

1) 12+(20+30)-2=(12+50)-2=62-2=60

2)4+6+(45-5)=10+40=50

3)65-30+(20-10)=35+10=45

4)(97-7)-(35-5)=90-30=60

Answer 2

To solve the given mathematical expressions, follow the order of operations (PEMDAS/BODMAS):

P: Parentheses (or Brackets) E: Exponents (or Orders, Indices) MD/B: Multiplication and Division (or BODMAS in some regions) AS: Addition and Subtraction

Let's solve each expression step by step:

1. 12 + (20 + 30) - 24 + 6 + (45 - 5) - 65 - 30 + (20 - 10)

Step 1: Calculate expressions inside parentheses: 12 + (50) - 24 + 6 + (40) - 65 - 30 + (10)

Step 2: Perform additions and subtractions from left to right: 12 + 50 - 24 + 6 + 40 - 65 - 30 + 10 62 - 24 + 6 + 40 - 65 - 30 + 10 38 + 6 + 40 - 65 - 30 + 10 44 + 40 - 65 - 30 + 10 84 - 65 - 30 + 10 19 - 30 + 10 -11 + 10 -1

So, the result of the expression is -1.

2. (97 - 7) - (35 - 5)

Step 1: Calculate expressions inside parentheses: 90 - 30

Step 2: Perform the subtraction: 60

So, the result of the expression is 60.

If you meant to provide more expressions, please let me know, and I'll be happy to help!