140\cdot 3 + 540:9= . 180\cdot 5 + 90:30= . 105\cdot 6-500:250= . 2000 - 250\cdot6= .

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\(140\cdot 3 + 540:9=\) [ ].
\(180\cdot 5 + 90:30=\) [ ].
\(105\cdot 6-500:250=\) [ ].
\(2000 - 250\cdot6=\) [ ].