0.71×0.9+0.071简便?
2个回答
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0.71×0.9+0.071
=0.71×0.9+0.071×1
=0.71×0.9+0.71×0.1
=0.71×(0.9+0.1)
=0.71×1
=0.71
=0.71×0.9+0.071×1
=0.71×0.9+0.71×0.1
=0.71×(0.9+0.1)
=0.71×1
=0.71
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因为0.071可以看成是0.71*0.1,
所以:
0.71*0.9+0.071
=0.71*0.9+0.71*0.1
=0.71*(0.9+0.1)
=0.71
所以:
0.71*0.9+0.071
=0.71*0.9+0.71*0.1
=0.71*(0.9+0.1)
=0.71
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