结尾的数与5结尾的数相乘后尾数袜轿桥为0102*105,202*205,302*305,402*405,502*505,602*605,702*705,802*805,902*905,总共有11个0200,300,400,500,600,700,800,900,1000总帆歼共有21个0,所以101*102*103*...*999*1000的积的告猛末尾有32个0
1000 100 10 2*5 =3+2+1+1=7个零
2个