直接写得数。4×=×==×2.5＝ ====

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4× $\text{[math]}$ =	$\text{[math]}$ × $\text{[math]}$ =	$\text{[math]}$ =	$\text{[math]}$ ×2.5＝
$\text{[math]}$ =	$\text{[math]}$ =	$\text{[math]}$ =	$\text{[math]}$ =

1. (2023六上·郯城月考) 直接写得数。4×=×==×2.5＝ ====