乘除混合脱式计算25+72+2552+18+1217+34+1961+12-23========37-16+2865+11-1256-37+2172÷9-8========38-25-1148-22-2187-35-495×6+20========29+6×744+8×331+4×648÷6+9========3×5+476×8+909+5×749÷7-5========51+56÷726+68×685+57×652+69×7========103+13×455+71×387+26×375+35×5========55+37×386+17×326+26×278+87×3========23+52×790+56×399+27×377+81×9========88+28×399+28×377+29×376+38×3========66+27×299+29×266+85×6======66+38×622+39×688+37×1======22+30×625+32×377+28×3======99+72×255+36×366+88×3======88+35×3121+63×655+86×3======77+26×233+43×6111+29×3======55+38×633+69×3====
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