3.8*10.1-0.38简便计算
问题描述:
3.8*10.1-0.38简便计算
答
3.8 × 10.1 - 0.38
= 3.8 × 10.1 - 3.8 × 0.1
= 3.8 × (10.1 - 0.1)
= 3.8 × 10
= 38