问题
解答题
计算: (1)-12+(-18)-(-7)-15; (2)-42÷(-1
|
答案
(1)原式=-12-18+7-15
=-38;
(2)原式=-16×(-
)-[-5 8
+5 8
]1 8
=10-(-
)1 2
=10
.1 2
计算: (1)-12+(-18)-(-7)-15; (2)-42÷(-1
|
(1)原式=-12-18+7-15
=-38;
(2)原式=-16×(-
)-[-5 8
+5 8
]1 8
=10-(-
)1 2
=10
.1 2