问题
解答题
计算 (1)(-1.5)+
(2)2
(3)-32-[-5+(1-0.6×
|
答案
(1)原式=-1.5+
+1 2
-0.23 5
=-1+0.4
=-0.6;
(2)原式=-
×9 4
÷(-6 7
)3 2
=-
;9 7
(3)原式=-9-[-5+(1-
)÷9]9 25
=-9-[-5+
÷9]16 25
=-9-[-5+
]16 225
=-9+5-16 225
=-4
.16 225