63.89-15.9×2.5简便计算
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63.89-15.9×2.5简便计算
=24×2.5+3.89-15.9×2.5
=(24-15.9)×2.5+3.89
=8.1×2.5+3.89
=(8+0.1)×2.5+3.89
=8×2.5+0.25+3.89
=20+0.25+3.89
=24.14
咨询记录 · 回答于2022-05-23
63.89-15.9×2.5简便计算
你好,亲亲,
63.89-15.9×2.5简便计算这个题目确定是63.89吗?亲亲
63.89-15.9×2.5简便计算=24×2.5+3.89-15.9×2.5=(24-15.9)×2.5+3.89=8.1×2.5+3.89=(8+0.1)×2.5+3.89=8×2.5+0.25+3.89=20+0.25+3.89=24.14