口算。－=1－=＋=4＋==+=

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$\text{[math]}$ － $\text{[math]}$ =	1－ $\text{[math]}$ =	$\text{[math]}$ ＋ $\text{[math]}$ =	4＋ $\text{[math]}$ =
$\text{[math]}$ $\text{[math]}$ =	$\text{[math]}$ + $\text{[math]}$ =	$\text{[math]}$ － $\text{[math]}$ =	4＋ $\text{[math]}$ =

1. (2024五下·寻乌期末) 口算。－=1－=＋=4＋==+=－=4＋=