99乘以102减1484,怎样简便运算?

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99乘以102减1484,怎样简便运算?

99乘以102减1484,怎样简便运算?
99乘以102减1484,怎样简便运算?

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

99*102-1484
=(100-1)*102-1484
=10200-102-1484
=10098-1484
=8516

99*102-1484
=(100-1)*102-1484
=10200-(102+1484)
=10200-1586
=8614

(100-1)*102+1484

99*(100+2)-1484=8614