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神机妙算细又巧.(计算下面各题能简算的要简算) (1)57×21×310(2)1835÷0.
问题详情
神机妙算细又巧.(计算下面各题能简算的要简算)
参考答案
(1)57×21×310,
=5×21×37×10,
=92;
(2)1835÷0.6×23,
=1835×106×23,
=47;
(3)2-613÷926-23,
=2-43-23,
=2-(43+23),
=2-2,
=0;
(4)910×[59÷(12-16)],
=910×[59÷26],
=910×159,
=32;
(5)(0.25+13)×(1.6÷45),
=34×2,
=32;
(6)(317+139)×17+22÷39,
=317×17+139×17+2239,
=3+(1739+2239),
=3+1,
=4.
考点: