Question

178×99+78的简便计算

Answer 1

178×99+78
=(100+78)×99+78
=100×99+78×99+78
=9900+78×(99+1)
=9900+78×100
=9900+7800
=17700

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Answer 2

178×99+78
=（100+78）×99+78
=9900+78×99+78
=9900+78×（99+1）
=9900+7800
=17700

Answer 3

178×99+78

=178×(99+1)-178+78
=17800-178+78
=17622+78
=17700

Answer 4

呵呵 需要楼上这么麻烦？
=178×（100-1）+78
=17800-178+78
=17800-100
=17700

Answer 5

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