口算下面各题.5-0.64= 0.8+12.2= 0.2×0.3= 0.63÷0.9= 2.7+7.3= 10×0.45= 0.21×2= 0.75÷0.
口算下面各题.5-0.64=0.8+12.2=0.2×0.3=0.63÷0.9=2.7+7.3=10×0.45=0.21×2=0.75÷0.25=0.7+2.8=7.3-...
口算下面各题.5-0.64= 0.8+12.2= 0.2×0.3= 0.63÷0.9= 2.7+7.3= 10×0.45= 0.21×2= 0.75÷0.25= 0.7+2.8= 7.3-0.6= 0.84÷0.2= 0.12×0= 0.4×0.05= 0.5÷100= 5.2+3.8= 1.45+5.5=
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