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Diagnose a Place-Value Misconception
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ParaPro
PPM.132 Diagnose a Place-Value Misconception
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A student says 15.050 is less than 15.05 because the extra zero 'takes away value.' Which explanation best identifies the misconception?
A
The student rounded both numbers to 15.
B
The student thinks a trailing decimal zero changes value instead of understanding equivalent decimal representations.
C
The student correctly identified 15.050 as smaller.
D
The student confused 15.050 with 15.005 because both contain zeros, under the stated conditions.
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