题目

计算: (1) -14 -5+30-2 (2) -8÷(-2)× 答案:解:﹣14 ﹣5+30﹣2=(﹣14﹣5﹣2)+30 =﹣21+30 =9; 解:﹣8÷(﹣2)× 14 =8× 12 × 14 =1.Lingling studied hard _____ she could pass the maths exam. A.because B.so that     C.after     D.while
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