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