99*78+33*66 也是用简便算法？

Question

如题所述

Answer 1

99×78+33×66
=99×（78+22）
=99×100
=9900

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Answer 2

99*78+33*66
=99*（78+22）
=9900

Answer 3

99×78+33×66
=99×78+33×3×22
=99×78+99×22
=99×（78+22）
=99×100
=9900