The problem in the image shows mathematical operations written as:

1. $2 \cdot 10 + 3 - 5$
2. $4 \cdot 12 - 18 \div 6$

Let’s solve each step-by-step:

Problem 1: $2 \cdot 10 + 3 - 5$

1. First, solve $2 \cdot 10$: $2 \cdot 10 = 20$
2. Then, add 3: $20 + 3 = 23$
3. Finally, subtract 5: $23 - 5 = 18$

Solution for Problem 1: $18$

Problem 2: $4 \cdot 12 - 18 \div 6$

1. First, solve $4 \cdot 12$: $4 \cdot 12 = 48$
2. Then, solve $18 \div 6$: $18 \div 6 = 3$
3. Finally, subtract $3$ from $48$: $48 - 3 = 45$

Solution for Problem 2: $45$

Final Answers:

1. $18$
2. $45$

Would you like further explanation or have additional questions?

Related Questions:

1. Can you explain the order of operations (PEMDAS) used here in detail?
2. What happens if the operations were performed out of order?
3. Can we create similar problems for practice?
4. What are the common mistakes students make in such problems?
5. How can parentheses change the results of these problems?

Tip: Always remember to follow the order of operations: Parentheses, Exponents, Multiplication/Division (from left to right), Addition/Subtraction (from left to right).