Question

which operation will not change the value of any nonzero number?
○ adding one
○ multiplying by one
○ multiplying by zero
○ dividing by zero
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Explanation:

• Adding one to a nonzero number (e.g., $5 + 1 = 6$) changes its value.
• Multiplying a nonzero number by one (e.g., $7 \times 1 = 7$) leaves its value unchanged, by the multiplicative identity property.
• Multiplying a nonzero number by zero (e.g., $4 \times 0 = 0$) changes its value to zero.
• Dividing by zero is undefined, so it does not preserve the original number's value.

Answer:

B. Multiplying by One