This math topic involves practicing the understanding of place value with decimals to determine the missing decimal component in a sum. The problems are structured as simple addition equations where one component is given, and the student must identify the missing decimal to complete the two-digit result correctly. Each equation is followed by multiple-choice answers. The topic is part of a broader unit on place value and rounding, addressing knowledge up to the thousandths place.
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Find the missing number to create the 2 digit decimal number
0.7 + ___ = 0.78