105×12-635简便计算,
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105×12-635简便计算,105×12-635简便计算,105×12-635简便计算,105×12-635=105×12-630-5=105×12-105×6-5=105×6-5=630-5=62
105×12-635简便计算,
105×12-635简便计算,
105×12-635简便计算,
105×12-635
=105×12-630-5
=105×12-105×6-5
=105×6-5
=630-5
=625