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(1+0.43+0.29)*(0.43+0.29+0.87)-(1+0.43+0.29+0.87)*(0.43+0.29)的简算方法

题目详情
(1+0.43+0.29)*(0.43+0.29+0.87)-(1+0.43+0.29+0.87)*(0.43+0.29)的简算方法
▼优质解答
答案和解析
(1+0.43+0.29)*(0.43+0.29+0.87)-(1+0.43+0.29+0.87)*(0.43+0.29)
=(1+0.43+0.29)*(0.43+0.29)+(1+0.43+0.29)*(0.87)-(1+0.43+0.29+0.87)*(0.43+0.29) 造同类项(0.43+0.29)
=【(1+0.43+0.29)-(1+0.43+0.29+0.87)】*(0.43+0.29)+(1+0.43+0.29)*(0.87) 合并同类项
=-0.87*(0.43+0.29)+(1+0.43+0.29)*(0.87)
=0.87*[-(0.43+0.29)+(1+0.43+0.29)] 合并同类项
=0.87