问题 口算题 直接写得数。0.5×0.7=0.12×0.3=0.4×0.6=1.7×2=3.5×0.2=4.6×0.3=0.9×1.8=0.05×20=2.14×3=8.2×0.3=0.09×5=0.24×3= 答案 0.35；0.036；0.24；3.4；0.7；1.38；1.62；1；6.42；2.46；0.45；0.72
