14.12+12.04*99-2.11
＝12.04+2.08+12.04*99-2.11
＝12.04x(1+99)+2.08-2.11
=12.04x100-0.03
=120.4-0.03
=120.37
14.12+12.04*99-2.11的简算
14.12+12.04*99-2.11
＝12.04+2.08+12.04*99-2.11
＝12.04x(1+99)+2.08-2.11
=12.04x100-0.03
=120.4-0.03
=120.37