9.9×3.8的简便计算怎么写?求大师解答

2025-04-01 22:04:34
推荐回答(2个)
回答1:

9.9×3.8 =(10-0.1)×3.8 =38-0.38 =37.62

回答2:

(10-0.1)(4-0.2)=40-0.4-2+0.02=40-2.4+0.02=40-2.38=37.62