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2018-05-07 · 知道合伙人教育行家
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13.2×9.9+13.2用简算
=13.2x(10-0.1)+13.2
=13.2x10-13.2x0.1+13.2
=132-1.32+13.2
=130.68+13.2
=143.88
=13.2x(10-0.1)+13.2
=13.2x10-13.2x0.1+13.2
=132-1.32+13.2
=130.68+13.2
=143.88
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