直接写出得数．1−78= 38+38 =12−15 =

题型：填空题题类：常考题难易度：普通

异分母分数加、减法(不含带分数) 6915

直接写出得数．

$\text{[math]}$

$\text{[math]}$ =

举一反三

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

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

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

$\text{[math]}$ ={#blank#}1{#/blank#}

$\text{[math]}$ {#blank#}2{#/blank#}

$\text{[math]}$ $\text{[math]}$ $\text{[math]}$

$\text{[math]}$ ×16= 1- $\text{[math]}$ = $\text{[math]}$

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

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

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

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