直接写得数 += += += &

1. (2022五下·莘县期末) 直接写得数

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

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

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1. (2022五下·莘县期末) 直接写得数 += += += - = 1- = - = -= - =