15.6×23.1+15.6-15.6×12.1简便运算

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15.6×23.1+15.6-15.6×12.1简便运算15.6×23.1+15.6-15.6×12.1简便运算15.6×23.1+15.6-15.6×12.1简便运算15.6x23.1+15.6-1

15.6×23.1+15.6-15.6×12.1简便运算
15.6×23.1+15.6-15.6×12.1简便运算

15.6×23.1+15.6-15.6×12.1简便运算
15.6x23.1+15.6-15.6x12.1=15.6x(23.1+1-12.1)=15.6x12=187.2