99乘以102减1484,怎样简便运算?
问题描述：
99乘以102减1484,怎样简便运算?
答
99*102-1484
=(100-1)*102-1484
=10200-(102+1484)
=10200-1586
=8614
答
（100-1）*102+1484
答
99*（100+2）-1484=8614
答
99*102-1484
=(100-1)*102-1484
=10200-102-1484
=10098-1484
=8516
答
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