计算，直接写得数 × = ×9= × = ×70= ﹣ = × = × = ×10= × = × = × =9× = ×10= × =140× = + = × =20× =75×

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1. 计算，直接写得数
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ ×9=
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ ×70=
$\text{[math]}$ ﹣ $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ ×10=
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =
9× $\text{[math]}$ =
$\text{[math]}$ ×10=
$\text{[math]}$ × $\text{[math]}$ =
140× $\text{[math]}$ =
$\text{[math]}$ + $\text{[math]}$ =
$\text{[math]}$ × $\text{[math]}$ =
20× $\text{[math]}$ =
75× $\text{[math]}$ =
$\text{[math]}$ ×25=

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