68.5*3.2-6.85*68脱式计算
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68.5*3.2-6.85*68脱式计算68.5*3.2-6.85*68脱式计算68.5*3.2-6.85*68脱式计算68.5x3.2-6.8x*68=6.85x32-6.85x68=6.85x(3
68.5*3.2-6.85*68脱式计算
68.5*3.2-6.85*68脱式计算
68.5*3.2-6.85*68脱式计算
68.5x3.2-6.8x*68
=6.85x32-6.85x68
=6.85x(32-68)
=-6.85x36
=-246.6
68.5*3.2-6.85*68
=6.85*32-6.85*68
=6.85(32-68)
=-6.85*36
=-246.6