题目
计算:
(1)
(+ )+(﹣0.25)﹣(3 )+(﹣5 )
(2)
( + ﹣ )÷(﹣ )
(3)
﹣104﹣[(﹣4)2﹣(3+32)×2]
答案: 解: (+34)+(−0.25)−(318)+(−534) =34+(−14)+(−318)+(−534) =﹣8 38
解:( 16 + 12 ﹣ 78 )÷(﹣ 124 ) = (16+12−78) ×(﹣24) =(﹣4)+(﹣12)+21 =5
解:﹣104﹣[(﹣4)2﹣(3+32)×2] =﹣10000﹣[16﹣(3+9)×2] =﹣10000﹣(16﹣24) =﹣10000﹣(﹣8) =﹣10000+8 =﹣9992.