X-(-6)>0,X>-6;
X-(-4)
若一個整數(shù)減去—6正是正數(shù),減去—4是負數(shù),則這個數(shù)減去9等于多少?
若一個整數(shù)減去—6正是正數(shù),減去—4是負數(shù),則這個數(shù)減去9等于多少?
數(shù)學人氣:356 ℃時間:2020-01-26 03:00:07
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