0.36×1.5-0.45的简便算法和0.38×0.23的简便算法
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0.36×1.5-0.45
=0.36x1.5-0.3x1.5
=1.5x(0.36-0.3)
=1.5x0.06
=0.09
0.38×0.23
=2x0.19x0.23
=0.19x2x0.23
=0.19x0.46
=0.0001x(20x46-1x46)
=0.0001x(920-46)
=0.0874
=0.36x1.5-0.3x1.5
=1.5x(0.36-0.3)
=1.5x0.06
=0.09
0.38×0.23
=2x0.19x0.23
=0.19x2x0.23
=0.19x0.46
=0.0001x(20x46-1x46)
=0.0001x(920-46)
=0.0874
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