66.6×9+22.2×23的简便方法。
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66.6×9+22.2×23
=22.2×(3×9)+22.2×23
=22.2×27+22.2×23
=22.2×(27+23)
=22.2×50
=1110
=22.2×(3×9)+22.2×23
=22.2×27+22.2×23
=22.2×(27+23)
=22.2×50
=1110
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