199.9×19.98+1.998简便计算
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199.9×19.98+1.998
=199.9×19.98+0.1x19.98
=(199.9+0.1)x19.98
=200x(20-0.02)
=200x20-200x0.02
=4000-4
=3996
199.9×19.98+1.998简便计算等于3996
=199.9×19.98+0.1x19.98
=(199.9+0.1)x19.98
=200x(20-0.02)
=200x20-200x0.02
=4000-4
=3996
199.9×19.98+1.998简便计算等于3996
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199.9×19.98+1.998
=199.9×19.98+1.998x10x0.1
=199.9×19.98+19.98x0.1
=19.98x(199.9+0.1)
=19.98x200
=3996
=199.9×19.98+1.998x10x0.1
=199.9×19.98+19.98x0.1
=19.98x(199.9+0.1)
=19.98x200
=3996
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展开全部
199.9x19.98+1.998
=199.9x19.98+19.98x0.1
=(199.9+0.1)x19.98
=200x19.98
=3996
=199.9x19.98+19.98x0.1
=(199.9+0.1)x19.98
=200x19.98
=3996
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展开全部
199.9×19.98+1.998
=199.9×19.98+19.98×0.1
=19.98×(199.9+0.1)
=19.98×200
=20×200-0.02×200
=4000-4
=3996
=199.9×19.98+19.98×0.1
=19.98×(199.9+0.1)
=19.98×200
=20×200-0.02×200
=4000-4
=3996
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