9.8乘2.5的简便计算
问题描述：
9.8乘2.5的简便计算
答
原式=（10-0.2）×2.5
=10×2.5-0.2×2.5
=25-0.5
=24.5
9.8乘2.5的简便计算
原式=（10-0.2）×2.5
=10×2.5-0.2×2.5
=25-0.5
=24.5