问题标题:
1-0.2x〔-3-4x(3.6-5.
问题描述:
1-0.2x〔-3-4x(3.6-5.
白小华回答:
1-0.2x〔-3-4x(3.6-5.3)〕
=1-0.2x〔-3-4x(-1.7)〕
=1-0.2x(-3+6.8)
=1-0.2x3.8
=1-0.76
=0.24
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