57×1.38+13.8×4.3简便算
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![57×1.38+13.8×4.3简便算](/uploads/image/z/752073-33-3.jpg?t=57%C3%971.38%2B13.8%C3%974.3%E7%AE%80%E4%BE%BF%E7%AE%97)
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57×1.38+13.8×4.3简便算
57×1.38+13.8×4.3简便算
57×1.38+13.8×4.3简便算
=13.8x5.7+13.8x4.3
=13.8x(5.7+4.3)
=13.8x10
=138