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250x17x4用脱式计算怎么算

250x17x4 =250x4x17 =1000x17 =17000

1.83x4+0.17x4 =4x(1.83+0.17) =4x2 =8

0.25x1.38x4 =(0.25x4)x1.38 =1x1.38 =1.38

17.8x(1.78x4)脱式计算简便 17.8×(1.78×4) =17.8×7.12 =126.736.

=25*4*17 =100*17 =1700

75x4x25x4 =(75x4)x(25x4) =300x100 =30000

25x11x4 =25x4x11 =100x(10+1) =100x10+100x1 =1000+100 =1100

0.75x4➗0.75x4用脱式计 =(0.75÷0.75)×(4×4) =1×16 =16

2.5x45x0.4 =2.5x0.4x45 =1x45 =45

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