Final answer:
To find the missing number, we can use the property of equality which states that if two quantities are equal and we add or subtract the same number to both sides, the resulting expression is still equal. In this case, the missing number is 171.
Step-by-step explanation:
To find the missing number, we can use the property of equality which states that if two quantities are equal and we add or subtract the same number to both sides, the resulting expression is still equal.
In this case, we need to add the missing number to 158 to get the same value as 329 plus 158. So, we can subtract 158 from both sides to isolate the missing number. This gives us 158 + missing number = 329. Subtracting 158 from both sides gives us the missing number = 329 - 158 = 171.
Therefore, the missing number is 171. None of the provided options, a. 329, b. 487, c. 316, or d. 158, match the value of the missing number.
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