甲、乙两种商品成本共250元,甲种商品按30%的利润定价,乙种商品按20%的利润定价。后来应顾客要求,两种商品都按定价的九折出售,仍可获利33.5元。问:甲种商品的成本是多少元?
口算.80×20%= 24×0.2= 5﹣= ÷3= 32=36÷12%= 1﹣0.3= 2.1+3.25= ×1.8= (0.2)2×52=
直接写出得数.2.8÷0.125= 4.38﹣3.42+5.62﹣2.08= == 9.08×9+9.08= =
直接写出得数.④36.36÷36=②×=③2.5×1.5×4=
直接写得数.1÷0.05= 0.325+= (0.2)2=10﹣0.01= = 3.1×0.7=
1.45×5= ×2.4= ×3÷= 1.6×0.125=4.7×9+4.7= 1.25×6.3×8= 6.5×2÷5= 15÷×=×2÷×2= 1÷﹣÷1=