问题描述:
巧算 (1)5×999+5+99×7+7+3×9+3 = = = = = (2)99999+
巧算
(1)5×999+5+99×7+7+3×9+3
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(2)99999+9999+999+99+9+5
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巧算
(1)5×999+5+99×7+7+3×9+3
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(2)99999+9999+999+99+9+5
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问题解答:
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