直接写得数。 + = - = 1- = + = 1- - =

1. (2020五下·硚口期末) 直接写得数。
$\text{[math]}$ + $\text{[math]}$ = $\text{[math]}$ - $\text{[math]}$ = 1- $\text{[math]}$ = $\text{[math]}$ + $\text{[math]}$ = 1- $\text{[math]}$ - $\text{[math]}$ =

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

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1. (2020五下·硚口期末) 直接写得数。 + = - = 1- = + = 1- - = - = 4+ = - = + = + - =