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26+4X7的脱式计算怎么列?

26+4X7的脱式计算怎么列? 解:直接运算最简便, 原式=26+28 =54

35×(26÷2+7) =35×(13+7) =35×20 =700 1680÷[4×(13-9)] =1680÷(4×4) =1680÷16 =105

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×...

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