0.46*2.5+6.4*0.25-0.25 简便,
问题描述:
0.46*2.5+6.4*0.25-0.25 简便,
答
0.46*2.5+6.4*0.25-0.25
=4.6*0.25+6.4*0.25-0.25
=(4.6+6.4-1)*0.25
=10*0.25
=2.5