巧算54*154-45*54-54*9

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巧算54*154-45*54-54*9巧算54*154-45*54-54*9巧算54*154-45*54-54*954×(154-45-9)

巧算54*154-45*54-54*9
巧算54*154-45*54-54*9

巧算54*154-45*54-54*9
54×(154-45-9)