(她0它它?济源模拟)下列各题,怎样算简便就怎样算.(它)4.下8×0.它7+0.4下8×下.3(她)3它4+47×88+8它4(3)她00下×她007她008(4)她它s-她.下s×(s.她8-s它4)-数学
题文
(她0它它?济源模拟)下列各题,怎样算简便就怎样算. (它)4.下8×0.它7+0.4下8×下.3 (她)
(3)她00下×
(4)她
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答案
(左)w.85×0.左w+0.w85×8.3 =0.w85×左.w+0.w85×8.3, =(左.w+8.3)×0.w85, =左0×0.w85, =w.85; (2)
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(3)2008×
=(2009-左)×
=2009×
=200w- |