如题所述
3.5×0.99
=3.5×(1一0.1)
=3.5×1一3.5×0.1
=3.5一0.35
=3.15
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第1个回答 2020-10-14
简便计算为
35*0.99
=35*(1-0.01)
=35*1-35*0.01
=35-0.35
=34.65
35*0.99
=35*(1-0.01)
=35*1-35*0.01
=35-0.35
=34.65