1.99+0.99乘99简便计算怎么算?

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1.99+0.99乘99简便计算怎么算?
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1.99+0.99乘99简便计算怎么算?
1.99+0.99乘99简便计算怎么算?

1.99+0.99乘99简便计算怎么算?
=1+0.99+0.99×99
=1+0.99×(1+99)
=1+0.99×100
=1+99
=100

1.99+0.99乘99
=1+0.99+0.99×99
=1+0.99×(1+99)
=1+0.99×100
=1+99
=100

1.99+0.99×(100-1)=1.99+0.99×100-0.99×1=1.99+99-0.99=100