12乘0.25用简便方法怎么算
问题描述:
12乘0.25用简便方法怎么算
答
12*0.25=3*4*0.25=3*(4*0.25)=3*1=312*0.25或=(10+2)*0.25=10*0.25+2*0.25=2.5+0.5=3
12乘0.25用简便方法怎么算
12*0.25=3*4*0.25=3*(4*0.25)=3*1=312*0.25或=(10+2)*0.25=10*0.25+2*0.25=2.5+0.5=3