7.2乘0.25加2.8除以4用简便方法计算.

问题描述:

7.2乘0.25加2.8除以4用简便方法计算.

7.2乘0.25加2.8除以4
=7.2*0.25+2.8*0.25
=0.25*(7.2+2.8)
=0.25*10
=2.5