问题 口算题 口算。0.1×0.03=4.5+2.7=2.74×4+4×2.26=4.08÷0.2=7.2×0.01=0.8×0.45×12.5= 1.21×2=1.4×3=6.8+0.92+3.2= 12÷0.04=4.1×0.7=19.13-3.5-6.5= 答案 0.003；7.2；20；20.4；0.072；0.45；2.42；4.2；10.92；300；2.87；9.13
