57×1.38+13.8×4.3简便算
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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
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