口算.×8=÷=5-=×÷×=12.3÷0.1=140÷70%=0.41-0.32=0.8a+0.5a=

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$\text{[math]}$ ×8=	$\text{[math]}$ ÷ $\text{[math]}$ =	5- $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ ÷ $\text{[math]}$ × $\text{[math]}$ =
12.3÷0.1=	140÷70%=	0.41-0.32=	0.8a+0.5a=

1. (2024六下·集美期末) 口算.×8=÷=5-=×÷×=12.3÷0.1=140÷70%=0.41-0.32=0.8a+0.5a=