6.5×3.8+61×0點(diǎn)65+6.5怎么簡(jiǎn)算？

該題要想簡(jiǎn)便運(yùn)算，可以提取公因數(shù)6.5 ，但是因?yàn)?1×0.65里邊沒(méi)有6.5，所以把61×0.65改成6.1×6.5，該題的計(jì)算過(guò)程為:
6.5×3.8+61×0.65+6.5
=6.5×3.8+6.1×6.5+6.5
=6.5×（3.8+6.1+1）
=6.5×10.9
=6.5×（10+0.9）
=6.5×10+6.5×0.9
=65+5.85
=70.85

解：簡(jiǎn)便計(jì)算方法如下
6.5×3.8+61×0.65+6.5
=6.5×3.8+6.1×6.5+6.5
=6.5×（3.8+6.1）+6.5
=6.5×9.9+6.5
=6.5×（10-0.1）+6.5
=6.5×10-6.5×0.1+6.5
=65-0.65+6.5
=64.35+6.5
=70.85

6.5＊3.8+61＊0.65+6.5
=6.5＊（3.8+6.1+1）
=6.5＊10.9
=6.5＊（10+0.9）
=65+6.5＊0.9
=65+5.85
=70.85

6.5×3.8+61×0.65+6.5
=6.5×3.8+6.1×6.5+6.5×1
=6.5×（3.8+6.1+1）
=6.5×10.9
=6.5×（10+0.9）
=65+6.5×0.9
=65+5.85
=70.85