Math Chapter 1

Question 1

Simplify 4 + 15 ÷ 3.

Answer 1

Step 1: Divide 15 ÷ 3 = 5.
Step 2: Add 4 + 5 = 9.
Final Answer: 9.
Explanation: According to the order of operations (PEMDAS/BODMAS), division is performed before addition.

Question 2

Simplify 3 · 5 - 8 ÷ 4 + 6.

Answer 2

Step 1: Multiply
Step 2: Divide
Step 3: Add
Step 4: Subtract
Final Answer: 19.
Explanation: Perform multiplication and division from left to right, then addition and subtraction from left to right.

Question 3

Simplify 10 ÷ [9 - (2 · 2)].

Answer 3

Step 1: Multiply inside the parentheses 2 · 2 = 4.
Step 2: Subtract inside the brackets 9 - 4 = 5.
Step 3: Divide 10 ÷ 5 = 2.
Final Answer: 2.
Explanation: Start with parentheses, then brackets, and finally division, following the order of operations.