97*2008-96*2009简算和0.91/0.8+1.25*1.09简算急
问题描述:
97*2008-96*2009简算和0.91/0.8+1.25*1.09简算
急
答
97*2008-96*2009
= (96+1)*2008-96*(2008+1)
=96*2008+2008-96*2008-96
=1912
0.91÷0.8+1.25×1.09
=0.91×1.25+1.25×1.09
=(0.91+1.09)×1.25
=2×1.25
=2.5