Question

42×99×59×99-99等于多少？

Answer 1

该是42*99+59*99-99

=99*(42+59-1)

=99*100

=9900

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Answer 2

42×99十59×99一99
＝（42+59-1）x99
＝100x99
＝9900

Answer 3

42*99*59*99-99可用简便计算：
99*（42+59-1）
=99*100
=9900

Answer 4

42*99*59*99-99
=99(42*99*59-1)
=24286779