看谁算得准，能简算的要简算．(1940+38)÷19 34×29×0.75×59 &...
看谁算得准，能简算的要简算．(1940+38)÷1934×29×0.75×59720÷[(56?23)×3]17×512+512÷75．...
看谁算得准，能简算的要简算．(1940+38)÷19 34×29×0.75×59 720÷[(56?23)×3] 17×512+512÷75．
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