Question

根据算式找规律63*67=6*（6+1）*100+3*7=4200+21=4221 1814*1816=181*（181

Answer 1

m+n=10 xm*xn=(x0+m)*(x0+n)=x*x*10*10+10*x*n+10*m*x+mn

=100*x*x+10*(m+n)*x+mn

=100*x*x+100*x+mn

=100*x*(x+1)+mn

x,m,n均为个位的数字例如xm为59那么x=5,m=9