17*19等于多少?

2025-12-14 11:56:24
推荐回答(3个)
回答1:

17*(19+1)-17
=17*20-17
=340-17
=323

回答2:

解:17×19

=(18-1)×(18+1)

=18²-1

=324-1

=323

回答3:

323