1995+199.5+19.95+1.995的简便算法急切等候

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1995+199.5+19.95+1.995的简便算法急切等候1995+199.5+19.95+1.995的简便算法急切等候1995+199.5+19.95+1.995的简便算法急切等候1995+19

1995+199.5+19.95+1.995的简便算法急切等候
1995+199.5+19.95+1.995的简便算法急切等候

1995+199.5+19.95+1.995的简便算法急切等候
1995+199.5+19.95+1.995
=(100+10+1+0.1)*19.95
=111.1*(20-0.05)
=2222-5.555
=2216.445

=2000-5+200-0.5+20-0.05+2-0.005
=2222-5.555
=2216.445

1995+199.5+19.95+1.995
=(100+10+1+0.1)*19.95
=111.1*(20-0.05)
=2222-5.555
=2216.445