问题 解答题 直接写得数.0.6+0.4×3=4.2×2+0.1=0.8×0.2-0.06=3×0.2×0.5=2.5×0.8×0.7=2.5×0.4×1.6= 答案 0.6+0.4×3=1.8;4.2×2+0.1=8.5;0.8×0.2-0.06=0.1;3×0.2×0.5=0.3;2.5×0.8×0.7=1.4;2.5×0.4×1.6=1.6.