9.9+9.99+9.999 脱式计算
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![9.9+9.99+9.999 脱式计算](/uploads/image/z/401663-47-3.jpg?t=9.9%2B9.99%2B9.999+%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%97)
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9.9+9.99+9.999 脱式计算
9.9+9.99+9.999 脱式计算
9.9+9.99+9.999 脱式计算
9.9+9.99+9.999
=10-0.1+10-0.01+10-0.001
=10+10+10-(0.1+0.01+0.001)
=30-0.111
=29.889
9.9+9.99+9.999
=9(1.1+1.11+1.111)
=9*3.321
=(10-1)*3.321
=33.21-3.321
=29.889