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2016-03-31
展开全部
2.6×0.6-1.8×0.5
=2.6×(0.5+0.1)-1.8×0.5
=2.6×0.5+2.6×0.1-1.8×0.5
=(2.6-1.8)×0.5+2.6×0.1
=0.8×0.5+0.26
=0.4+0.26
=0.66
=2.6×(0.5+0.1)-1.8×0.5
=2.6×0.5+2.6×0.1-1.8×0.5
=(2.6-1.8)×0.5+2.6×0.1
=0.8×0.5+0.26
=0.4+0.26
=0.66
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