简便计算 101×26.9-1.25×26.9×0.8
2013-07-10
展开全部
解1、 101×26.9-1.25×26.9×0.8
=101×26.9-1.25×0.8 ×26.9
=101×26.9-1×26.9
=(101-1)×26.9
=2690
2、2.4×0.19+0.24×8.1
=0.24×1.9+0.24×8.1
=0.24×(1.9+8.1)
=2.4
=101×26.9-1.25×0.8 ×26.9
=101×26.9-1×26.9
=(101-1)×26.9
=2690
2、2.4×0.19+0.24×8.1
=0.24×1.9+0.24×8.1
=0.24×(1.9+8.1)
=2.4
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