222×631 666×123怎样简算
推荐于2016-08-09 · 知道合伙人教育行家
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222×631+666×123
=222×631+(222×3)×123
=222×631+222×(3×123)
=222×631+222×369
=222×(631+369)
=222×1000
=222000
=222×631+(222×3)×123
=222×631+222×(3×123)
=222×631+222×369
=222×(631+369)
=222×1000
=222000
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