0.25×0.9 2.6 2.6×0.1简便运算
2016-10-08
展开全部
0.25×0.9+2.6+ 2.6×0.1
=0.25-0.025+2.6+0.26
=2.85+0.26-0.025
=2.85+0.15+0.11-0.025
=3+0.11-0.025
=3.085
=0.25-0.025+2.6+0.26
=2.85+0.26-0.025
=2.85+0.15+0.11-0.025
=3+0.11-0.025
=3.085
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