问题 口算题 直接写得数。0.9-0.85=7.7+3.3=0.5×0.3=3.8+2=0.2×0.1=4.16÷100=0.12×0.5=0×7.8÷7.8= 答案 0.05；11；0.15；5.8；0.02；0.00416；0.06；0
