999×2.23+3.33×33.1的简便运算

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999×2.23+3.33×33.1的简便运算
999×2.23+3.33×33.1的简便运算

999×2.23+3.33×33.1的简便运算
99.9×2.23+3.33×33.1 好像错个小数点
=33.3×6.69+3.33×33.1
=3.33×66.9+3.33×33.1
=3.33×(66.9+33.1)
=3.33×100
=333