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6.26X13.8-0.625x38+6.26的简便运算
=（6.25+0.01）x13.8-6.25x3.8+6.26
=6.25x13.8+0.01x13.8-6.25x3.8+6.26
=6.25x(13.8-3.8)+0.138+6.26
=6.25x10+6.398
=62.5+6.398
=68.898
=（6.25+0.01）x13.8-6.25x3.8+6.26
=6.25x13.8+0.01x13.8-6.25x3.8+6.26
=6.25x(13.8-3.8)+0.138+6.26
=6.25x10+6.398
=62.5+6.398
=68.898
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