9.88*99+9.88 简便运算

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9.88*99+9.88 简便运算

9.88*99+9.88 简便运算
9.88*99+9.88 简便运算

9.88*99+9.88 简便运算
9.88*99+9.88
=9.88(99+1)
=9.88*100
=988

988

9.88*99+9.88
=9.88*99+9.88*1
=9.88(99+1)
=9.88*100
=988