计算3.236×(-7)+(3.264)×7-(-2.5)×7
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![计算3.236×(-7)+(3.264)×7-(-2.5)×7](/uploads/image/z/1124415-63-5.jpg?t=%E8%AE%A1%E7%AE%973.236%C3%97%EF%BC%88-7%EF%BC%89%2B%EF%BC%883.264%EF%BC%89%C3%977-%EF%BC%88-2.5%EF%BC%89%C3%977)
计算3.236×(-7)+(3.264)×7-(-2.5)×7
计算3.236×(-7)+(3.264)×7-(-2.5)×7
计算3.236×(-7)+(3.264)×7-(-2.5)×7
3.236×(-7)+(3.264)×7-(-2.5)×7
= 7 x ( -3.236 + 3.264 + 2.5 )
= 7 x 2.5
= 17.5
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解
3.236×(-7)+(3.264)×7-(-2.5)×7
=3.236×(-7+7)-(-2.5)×7
=0+2.5×7
=17.5