题目内容
计算
(1)(-1.5)+
-(-
)-0.2;
(2)2
×(-
)÷(
-2);
(3)-32-[-5+(1-0.6×
)÷(-3)2].
(1)(-1.5)+
1 |
2 |
3 |
5 |
(2)2
1 |
4 |
6 |
7 |
1 |
2 |
(3)-32-[-5+(1-0.6×
3 |
5 |
(1)原式=-1.5+
+
-0.2
=-1+0.4
=-0.6;
(2)原式=-
×
÷(-
)
=-
;
(3)原式=-9-[-5+(1-
)÷9]
=-9-[-5+
÷9]
=-9-[-5+
]
=-9+5-
=-4
.
1 |
2 |
3 |
5 |
=-1+0.4
=-0.6;
(2)原式=-
9 |
4 |
6 |
7 |
3 |
2 |
=-
9 |
7 |
(3)原式=-9-[-5+(1-
9 |
25 |
=-9-[-5+
16 |
25 |
=-9-[-5+
16 |
225 |
=-9+5-
16 |
225 |
=-4
16 |
225 |
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