0.3x2.5x0.4用递等式怎么算?

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0.3x2.5x0.4用递等式怎么算?0.3x2.5x0.4用递等式怎么算?0.3x2.5x0.4用递等式怎么算?0.3×(2.5×0.4)=0.3×1=0.3

0.3x2.5x0.4用递等式怎么算?
0.3x2.5x0.4用递等式怎么算?

0.3x2.5x0.4用递等式怎么算?
0.3×(2.5×0.4)
=0.3×1
=0.3