5.9x0.78简便运算怎么做
问题描述:
5.9x0.78简便运算怎么做
答
5.9x0.78
=(6-0.1)x(0.8-0.02)
=6x0,8-6x0.02-0.1x0.8+0.1x0.02
=4.8-0.12-0.08+0.002
=4.602