问题 口算题 直接写得数。32.8+19=0.42×0.5=100×0.05=1.6×0.4=0.67+1.24=1.82-0.63=1.8×0.2=0.25×4=0.16+6.4=0.17×4=3.06×0.2=1.2×0.5= 答案 51.8；0.21；5；0.64；1.91；1.19；0.36；1；6.56；0.068；0.612；0.6
