简便计算 帮我解 是0.25Ⅹ39+0.25 0.25Ⅹ3.2Ⅹ0.125

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简便计算帮我解是0.25Ⅹ39+0.250.25Ⅹ3.2Ⅹ0.125简便计算帮我解是0.25Ⅹ39+0.250.25Ⅹ3.2Ⅹ0.125简便计算帮我解是0.25Ⅹ39+0.250.25Ⅹ3.2Ⅹ0.1

简便计算 帮我解 是0.25Ⅹ39+0.25 0.25Ⅹ3.2Ⅹ0.125
简便计算 帮我解 是0.25Ⅹ39+0.25 0.25Ⅹ3.2Ⅹ0.125

简便计算 帮我解 是0.25Ⅹ39+0.25 0.25Ⅹ3.2Ⅹ0.125
0.25Ⅹ39+0.25
=0.25Ⅹ39+0.25Ⅹ1
=0.25Ⅹ(39+1)
=1/4Ⅹ40
=10
0.25Ⅹ3.2Ⅹ0.125
=0.25Ⅹ4Ⅹ0.8Ⅹ0.125
=1Ⅹ0.1
=0.1