1.79+1.99×99用简便运算

1.79+1.99×99用简便运算
2025-04-01 20:11:35
推荐回答(1个)
回答1:

1.79+1.99×99
=1.79+1.99×100 -1.99
=199 +1.79-1.99
=199 -0.2
=198.8