一、 直接写得数:(10分)1.4×0.2= 1/5 +1/4 = 2÷1/4 = 38.9+1= 5/9 ×3/5 = 8 × 1/6= 2/7 ÷ 1/7= 1/6 +2/6 = 5-0.25 = 1÷1/5=
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