3.75*99*2+7.5的简便计算是
问题描述：
3.75*99*2+7.5的简便计算是
答
原题=3.75*99*2+7.5
=7.5×(99+1)
= 750
答
3.75*100*2+7.5-3.75*2
答
3.75×99×2+7.5
=3.75×2×99+7.5
=7.5×99+7.5
=7.5×(99+1)
=7.5×100
=7500