题目内容
用简便方法计算:18×(
-
)-(-24)×(
+
)
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原式=[18×
-18×
]-[(-24)×
+(-24)×
]
=(9-6)-[(-8)+(-3)]
=3-(-11)
=14.
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=(9-6)-[(-8)+(-3)]
=3-(-11)
=14.
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