Math Problem Statement
一元人民币换成5角，2角，1角，5分，2分，1分零钱，有多少种换法？
Solution
Math Problem Analysis
Mathematical Concepts
Combinatorics
Integer partitioning
Formulas
50x + 20y + 10z + 5a + 2b + c = 100
Theorems

Suitable Grade Level
Grades 1012
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