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计算:76.23×5104.98-396.5×510.498+51049.8×6.342=.

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计算:76.23×5104.98-396.5×510.498+51049.8×6.342=______.
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答案和解析
76.23×5104.98-396.5×510.498+51049.8×6.342,
=76.23×5104.98-39.65×5104.98+5104.98×63.42
=(76.23-39.65+63.42)×5104.98,
=100×5104.98,
=510498;
故答案为:510498.