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计算(1)-3-4+19-11+2(2)3×(-4)+(-28)÷7(3)(12−56−29)×36(4)123×(−49)×(−2.5)÷(−253)(5)|−115|÷(13−15)−13×(−3)2(6)1−12×[3×(−23)2−(−1)4]+14÷(−12)3.
题目详情
计算
(1)-3-4+19-11+2
(2)3×(-4)+(-28)÷7
(3)(
−
−
)×36
(4)1
×(−
)×(−2.5)÷(−
)
(5)|−1
|÷(
−
)−
×(−3)2
(6)1−
×[3×(−
)2−(−1)4]+
÷(−
)3.
(1)-3-4+19-11+2
(2)3×(-4)+(-28)÷7
(3)(
1 |
2 |
5 |
6 |
2 |
9 |
(4)1
2 |
3 |
4 |
9 |
25 |
3 |
(5)|−1
1 |
5 |
1 |
3 |
1 |
5 |
1 |
3 |
(6)1−
1 |
2 |
2 |
3 |
1 |
4 |
1 |
2 |
▼优质解答
答案和解析
(1)-3-4+19-11+2,
=(-3-4-11)+(19+2),
=-(3+4+11)+(19+2),
=-18+21,
=3;
(2)3×(-4)+(-28)÷7,
=-12+(-4),
=-16;
(3)(
-
-
)×36,
=
×36-
×36-
×36,
=18-30-8,
=18-38,
=-20;
(4)1
×(-
)×(-2.5)÷(-
),
=
×(-
)×(-
)×(-
),
=-
×
×
×
,
=-
;
(5)|-1
|÷(
-
)-
×(-3)2,
=|-
|÷
-
×9,
=
×
-3,
=9-3,
=6;
(6)1-
×[3×(-
)2-(-1)4]+
=(-3-4-11)+(19+2),
=-(3+4+11)+(19+2),
=-18+21,
=3;
(2)3×(-4)+(-28)÷7,
=-12+(-4),
=-16;
(3)(
1 |
2 |
5 |
6 |
2 |
9 |
=
1 |
2 |
5 |
6 |
2 |
9 |
=18-30-8,
=18-38,
=-20;
(4)1
2 |
3 |
4 |
9 |
25 |
3 |
=
5 |
3 |
4 |
9 |
5 |
2 |
3 |
25 |
=-
5 |
3 |
4 |
9 |
5 |
2 |
3 |
25 |
=-
2 |
9 |
(5)|-1
1 |
5 |
1 |
3 |
1 |
5 |
1 |
3 |
=|-
6 |
5 |
2 |
15 |
1 |
3 |
=
6 |
5 |
15 |
2 |
=9-3,
=6;
(6)1-
1 |
2 |
2 |
3 |
作业帮用户
2016-12-09
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