口算.1－ 25 ＝1－ 47 ＝1－ 58 ＝

题型：填空题题类：常考题难易度：容易

异分母分数加、减法(不含带分数) 6937

口算.

1－ $\text{[math]}$ ＝

举一反三

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

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

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

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

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

30×80= 62×10= 0.5+0.9= 8.5-0.2=

$\text{[math]}$ $\text{[math]}$ 15×5-5= 810÷（3×3）=

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