57.6×1.6+28.8×36.8-14.4×80
=57.6×1.6+28.8×2×18.4-14.4×4×20
=57.6×1.6+57.6×18.4-57.6×20
=57.6×(1.6+18.4-20)
=0
用简便方法计算:57.6×1.6+28.8×36.8-14.4×80.
用简便方法计算:57.6×1.6+28.8×36.8-14.4×80.
数学人气:861 ℃时间:2020-01-30 16:48:34
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