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5.25×9.9+0.528
=5.25×9.9+0.525+0.003
=5.25×9.9+5.25*0.1+0.003
=5.25*10+0.003
=52.5+0.003
=52.503
=5.25×9.9+0.525+0.003
=5.25×9.9+5.25*0.1+0.003
=5.25*10+0.003
=52.5+0.003
=52.503
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展开全部
5.25×9.9 + 0.528
= 0.525×99 + 0.525 + 0.003
= 0.525×100 + 0.003
= 52.503
= 0.525×99 + 0.525 + 0.003
= 0.525×100 + 0.003
= 52.503
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展开全部
5.25×9.9+0.528的简便算法
5.25×9.9+0.528
=5.25×9.9+0.525+0.003
=5.25x(9.9+0.1)+0.003
=52.5+0.003
=52.503
5.25×9.9+0.528
=5.25×9.9+0.525+0.003
=5.25x(9.9+0.1)+0.003
=52.5+0.003
=52.503
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