(1.9-1.9*0.9)/(17.6-16.6)
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(1.9-1.9*0.9)/(17.6-16.6)(1.9-1.9*0.9)/(17.6-16.6)(1.9-1.9*0.9)/(17.6-16.6)(1.9-1.9*0.9)/(17.6-16.6)
(1.9-1.9*0.9)/(17.6-16.6)
(1.9-1.9*0.9)/(17.6-16.6)
(1.9-1.9*0.9)/(17.6-16.6)
(1.9-1.9*0.9)/(17.6-16.6)
=1.9(1-0.9)/ 1
=0.19
(1.9-1.9*0.9)/(17.6-16.6) =1.9*(1-0.9)/1=1.9*0.1=0.19
(1.9-1.9*0.9)/(17.6-16.6)
简便计算.(1.9-1.9×0.9)÷(17.6-17.41)、13-4分之3-5分之2 简便计算.(1.9-1.9×0.9)÷(17.6-17.41)、13-4分之3-5分之2
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