299。9乘19。98减199。8乘29。97等于几

2025-03-11 11:22:54
推荐回答(1个)
回答1:

解:
299.9×19.98-199.8×29.97
=29.99×199.8-199.8×29.97
=(29.99-29.97)×199.8
=3.996