This math topic focuses on understanding place values by identifying missing digits to complete a three-digit number. Each problem presents a simple addition equation involving a placeholder, and learners must determine which option correctly completes the equation. The topic is structured as practice problems and is part of a larger unit on place values and rounding to the nearest thousands and hundredths. These problems are designed to enhance numerical reasoning and deepen understanding of how digits contribute distinct values based on their positions in multi-digit numbers.
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Find the missing number to create the 3 digit number
900 + ___ = 990