17ᘧ࿾9.9锧1.7简便方法怎么做?

2024-11-22 08:32:06
推荐回答(5个)
回答(1):

17×9.9+1.7
=17×(10-0.1)+1.7
=170-1.7+1.7
=170

回答(2):

17×9.99+1.7
=(l7÷10)×(9.9×10)+11.7/
=l.7×99+1.7
=1.7×(99+1)
=1.7×100
=170

回答(3):

17×9.9+1.7
=1.7×99+1.7
=1.7×(99+1)
=170

回答(4):

17✖️9.9➕1.7
=1.7×99+1.7
=1.7×(99+1)
=1.7×100
=170

回答(5):

17×9.9+1.7
=17×9.9+17×0.1
=17×(9.9+0.1)
=17×10
=170