题目内容
计算:
(1)7
-5
-3
-6
+9
+2
(2)(-0.5)÷1
×(-11)
(3)-7×
+(-5)×(-
)-
(4)(
-
-
)×(-60)
(5)-32-
×[(-5)2×(-
)-240÷(-4)×
].
(1)7
3 |
4 |
4 |
11 |
1 |
4 |
7 |
11 |
1 |
4 |
1 |
4 |
(2)(-0.5)÷1
5 |
6 |
(3)-7×
5 |
4 |
5 |
4 |
2 |
5 |
(4)(
2 |
3 |
11 |
12 |
14 |
15 |
(5)-32-
1 |
3 |
3 |
5 |
1 |
4 |
(1)7
-5
-3
-6
+9
+2
=(7
-3
+9
+2
)-(5
+6
)
=16-12
=4;
(2)(-0.5)÷1
×(-11)
=
×
×(-11)
=-3;
(3)-7×
+(-5)×(-
)-
=(-7+5)×
-
=(-2)×
-
=-
-
=-2
;
(4)(
-
-
)×(-60)
=-
×60+
×60+
×60
=-40+55+56
=71;
(5)-32-
×[(-5)2×(-
)-240÷(-4)×
]
=-9-
×[25×(-
)+60×
]
=-9-
×[-15+15]
=-9-
×0
=-9-0
=-9.
3 |
4 |
4 |
11 |
1 |
4 |
7 |
11 |
1 |
4 |
1 |
4 |
=(7
3 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
4 |
11 |
7 |
11 |
=16-12
=4;
(2)(-0.5)÷1
5 |
6 |
=
1 |
2 |
6 |
11 |
=-3;
(3)-7×
5 |
4 |
5 |
4 |
2 |
5 |
=(-7+5)×
5 |
4 |
2 |
5 |
=(-2)×
5 |
4 |
2 |
5 |
=-
5 |
2 |
2 |
5 |
=-2
9 |
10 |
(4)(
2 |
3 |
11 |
12 |
14 |
15 |
=-
2 |
3 |
11 |
12 |
14 |
15 |
=-40+55+56
=71;
(5)-32-
1 |
3 |
3 |
5 |
1 |
4 |
=-9-
1 |
3 |
3 |
5 |
1 |
4 |
=-9-
1 |
3 |
=-9-
1 |
3 |
=-9-0
=-9.
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