(2·5-2·5x0·6)除以4
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(2·5-2·5x0·6)除以4(2·5-2·5x0·6)除以4(2·5-2·5x0·6)除以4(2·5-2·5x0·6)除以4=[2.5×(1-0.6)]÷4=2.5×0.4÷4=2.5×0.1=0
(2·5-2·5x0·6)除以4
(2·5-2·5x0·6)除以4
(2·5-2·5x0·6)除以4
(2·5-2·5x0·6)除以4
=[2.5×(1 - 0.6)]÷4
=2.5×0.4÷4
=2.5×0.1
=0.25