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下面各题 怎样筒便就怎样算. 18÷(4.49+34.3×0.2)813÷7+17×5131
问题详情
下面各题,怎样筒便就怎样算.
参考答案
(1)18÷(4.49+34.3×0.2)
=18÷(4.49+6.86)
=18÷11.35
=1133227;
(2)813÷7+17×513
=813×17+17×513
=(813+513)×17
=1×17
=17;
(3)1110-14-34+910
=(1110+910)-(14+34)
=2-1
=1;
(4)12×3.2+5.6×0.5+1.2×50%
=0.5×3.2+5.6×0.5+1.2×0.5
=(3.2+5.6+1.2)×0.5
=10×0.5
=5;
(5)(9-3.06÷35)×2013
=(9-5.1)×2013
=3.9×2013
=6;
(6)[1-(53-1.5)÷512]×0.75
=[1-16÷512]×0.75
=[1-25]×0.75
=35×0.75
=920.
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