99*102-1484
=（100-1）（100+2）-1484
=100*100+100-2-1484
=101*100-1486
=101*100-15*100+14
=86*100+14
=8614
99乘以102减1484,怎样简便运算?
99*102-1484
=（100-1）（100+2）-1484
=100*100+100-2-1484
=101*100-1486
=101*100-15*100+14
=86*100+14
=8614