口算下列各题 =1÷0.2= ÷ = × =0.23 x 0.3=9- =

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$\text{[math]}$ =	1÷0.2=	$\text{[math]}$ ÷ $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =
0.23 x 0.3=	9- $\text{[math]}$ =	$\text{[math]}$ - $\text{[math]}$ =	$\text{[math]}$ ÷ $\text{[math]}$ =

1. 口算下列各题 =1÷0.2= ÷ = × =0.23 x 0.3=9- = - = ÷ =