用简便方法计算:1.05x7.5-0.5x0.75

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用简便方法计算:1.05x7.5-0.5x0.75用简便方法计算:1.05x7.5-0.5x0.75用简便方法计算:1.05x7.5-0.5x0.75原式=1.05×10×0.75-0.5×0.75=

用简便方法计算:1.05x7.5-0.5x0.75
用简便方法计算:1.05x7.5-0.5x0.75

用简便方法计算:1.05x7.5-0.5x0.75
原式=1.05×10×0.75-0.5×0.75
=(1.05×10-0.5)×0.75
=(10.5-0.5)×0.75
=10×0.75
=7.5