27.6-560%-4.4-7.6 2.48x56%+2.48x44%
=27.6-5.6-(4.4+7.6) =2.48x(56%+44%)
=22-12 =2.48x1
=10 =2.48
27.6—560%—4.4—7.6 2.48乘56%+2.48乘44%
27.6-560%-4.4-7.6 2.48x56%+2.48x44%
=27.6-5.6-(4.4+7.6) =2.48x(56%+44%)
=22-12 =2.48x1
=10 =2.48