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33.33*66.66+44.44*99.99=33*66.66+44.44*99.99如何简便?
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33.33*66.66+44.44*99.99=
33*66.66+44.44*99.99如何简便?
33*66.66+44.44*99.99如何简便?
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答案和解析
33.33*66.66+44.44*99.99
=33.33×3×22.22+44.44×99.99
=99.99×22.22+44.44×99.99
=99.99×(22.22+44.44)
=99.99×66.66
=(100-0.01)×66.66
=6666-0.6666
=6665.3334
=33.33×3×22.22+44.44×99.99
=99.99×22.22+44.44×99.99
=99.99×(22.22+44.44)
=99.99×66.66
=(100-0.01)×66.66
=6666-0.6666
=6665.3334
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