简便计算102*98

问题描述:

简便计算102*98

102*98=(100+2)(100-2)=100^2-2^2=10000-4=9996

102*98
=(100+2)*(100-2)
=100^2-2^2
=10000-4
=9996

102*98=(100+2)(100-2)=100*100-2*2=9996