Based on the options provided, I can't determine which statements about Sid's work are true without additional context about his calculations. However, typically in subtraction, it’s important to line up place values correctly and to perform the subtraction correctly (including borrowing if needed).
Here’s some guidance on evaluating the statements:
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Sid forgot to subtract the hundreds place, so his answer is incorrect. - This could be true if Sid was supposed to subtract a number that included a hundreds place value and he didn't account for it.
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Sid should have added 346 and 214. - If the context of the problem was meant to be addition instead of subtraction, this could be true.
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Sid’s answer of 32 is correct. - This requires knowing what the correct answer is. If the subtraction or addition done was meant to equal 32, then this could be true.
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Sid lined up the place values correctly. - This would generally be true if his addition or subtraction was correct and properly executed.
Without knowing the specifics of Sid's work, I can’t definitively identify which two statements are true. Please check your answers against Sid's actual calculations to determine their correctness.