口算7A÷9A=16π≈=9-0.75-0.25=÷0.625==0.052=90÷=0.9+99×0.9=×3÷×3=

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7A÷9A=	16π≈	$\text{[math]}$ =	9-0.75-0.25=	$\text{[math]}$ ÷0.625=
$\text{[math]}$ =	0.05²=	90÷ $\text{[math]}$ =	0.9+99×0.9=	$\text{[math]}$ ×3÷ $\text{[math]}$ ×3=

1. (2023六上·蕉岭期中) 口算7A÷9A=16π≈=9-0.75-0.25=÷0.625==0.052=90÷=0.9+99×0.9=×3÷×3=