人教版七年级数学上册有理数加减法计算题 452.docx
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人教版七年级数学上册有理数加减法计算题452
(+6)-(-3)(+2.3)+(+3.8)50-(-69)
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(+9)-(-1)(+6.7)+(-7.5)2-19
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(-7)-(-5)(-3.9)-(+8.4)42-(-64)
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(+6)-(+7)(+6.7)-(+7.5)45-(-96)
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