直接写得数． ×0= × = ×12= × =45× =9× = × = ×100=18× = × =

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$\text{[math]}$ ×0=	$\text{[math]}$ × $\text{[math]}$ =	$\text{[math]}$ ×12=	$\text{[math]}$ × $\text{[math]}$ =	45× $\text{[math]}$ =
9× $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =	$\text{[math]}$ ×100=	18× $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =

1. 直接写得数． ×0= × = ×12= × =45× =9× = × = ×100=18× = × =