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用合适的方法计算下面各题. (34-325)×10027×1711+511×2738×101
问题详情
用合适的方法计算下面各题.
参考答案
(1)(34-325)×100,
=34×100-325×100,
=75-12,
=63;
(2)27×1711+511×27,
=27×(1711+511),
=27×2,
=47;
(3)38×1011+58÷1110,
=38×1011+58×1011,
=(38+58)×1011,
=1×1011,
=1011;
(4)(12×56-7.3)÷94,
=(10-7.3)÷94,
=2.7×49,
=1.2;
(5)89÷〔(25+110)×43],
=89÷〔12×43〕,
=89×32,
=43;
(6)(913×27-913)×718,
=[(913×(27-1)]×718.
=[913×26]×718,
=18×718,
=7.
考点:方法