16.22*99+16.12怎么简便
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2017-01-10
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16.22*99+16.12怎么简便
=16.22x99+16.22-0.1
=16.22x(99+1)-0.1
=16.22x100-0.1
=1622-0.1
=1621.9
=16.22x99+16.22-0.1
=16.22x(99+1)-0.1
=16.22x100-0.1
=1622-0.1
=1621.9
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