115*64+230*68的简便计算
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115*64+230*68的简便计算
115×64+230×68
=115×64+115×2×68
=115×(64+2×68)
=115×(64+136)
=115×200
=23000
不用呢么复杂的
115*64+230*68的简便计算
115×64+230×68
=115×64+115×2×68
=115×(64+2×68)
=115×(64+136)
=115×200
=23000
不用呢么复杂的