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13×3×79×11如何简便计算
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13ⅹ3ⅹ79ⅹ11
=39ⅹ79ⅹ11
=3081ⅹ11
=3081ⅹ(10+1)
=3081ⅹ10+3081ⅹ1
=3081ⅹ10+308
=30810+3081
=33891
=39ⅹ79ⅹ11
=3081ⅹ11
=3081ⅹ(10+1)
=3081ⅹ10+3081ⅹ1
=3081ⅹ10+308
=30810+3081
=33891
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