用简便方法计算9·9x2·3

用简便方法计算9·9x2·3
2024-12-17 07:04:22
推荐回答(1个)
回答1:

9.9×2.3
=(10-0.1)×2.3
=10×2.3-0.1×2.3
=23-0.23
=22.77