题目内容
【题目】计算
(1+0.23+0.34)×(0.23+0.34+0.45)﹣(1+0.23+0.34+0.45)×(0.23+0.34)=_____.
【答案】0.45
【解析】
(1+0.23+0.34)×(0.23+0.34+0.45)﹣(1+0.23+0.34+0.45)×(0.23+0.34)
=(1+0.57)×1.02﹣2.02×0.57
=1.02+0.57×1.02﹣2.02×0.57
=1.02﹣2.02×0.57+1.02×0.57
=1.02﹣(2.02﹣1.02)×0.57
=1.02﹣0.57
=0.45
故答案为:0.45.

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