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12.

Simplify the expression.

9(10 + 5) ÷ (6 – 5)

1 answer

To simplify the expression \( 9(10 + 5) ÷ (6 – 5) \), we will follow the order of operations (also known as PEMDAS/BODMAS).

  1. Parentheses first:

    • Calculate \( 10 + 5 = 15 \)
    • Calculate \( 6 - 5 = 1 \)

  2. Now substitute back into the expression: \[ 9(15) ÷ 1 \]

  3. Multiply 9 by 15: \[ 9 \times 15 = 135 \]

  4. Now divide by 1: \[ 135 ÷ 1 = 135 \]

The simplified expression is \( \boxed{135} \).