口算． 12﹣ =1.25× ×0.8=1275﹣（167+275）=1.01×23= ×4÷4× =（ + ）÷ =

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12﹣ $\text{[math]}$ =	1.25× $\text{[math]}$ ×0.8=	1275﹣（167+275）=
1.01×23=	$\text{[math]}$ ×4÷4× $\text{[math]}$ =	（ $\text{[math]}$ + $\text{[math]}$ ）÷ $\text{[math]}$ =

1. (2016·岱山模拟) 口算． 12﹣ =1.25× ×0.8=1275﹣（167+275）=1.01×23= ×4÷4× =（ + ）÷ =