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计算:(1)3.75+(−458)+1.625+(−234)+(−529);(2)[1512−(134÷125)−134÷312]÷(−138).
题目详情
3.75+(−4
5 |
8 |
3 |
4 |
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
5 |
8 |
3 |
4 |
2 |
9 |
[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
▼优质解答
答案和解析
(1)3.75+(−4
)+1.625+(−2
)+(−5
)
=(3.75-2.75)+(-4.625+1.625)-5
=1-3-5
=-7
;
(2)[15
−(1
÷1
)−1
÷3
]÷(−1
)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10. 3.75+(−4
5 5 58 8 8)+1.625+(−2
3 3 34 4 4)+(−5
2 2 29 9 9)
=(3.75-2.75)+(-4.625+1.625)-5
=1-3-5
=-7
;
(2)[15
−(1
÷1
)−1
÷3
]÷(−1
)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10.
2 2 29 9 9
=1-3-5
=-7
;
(2)[15
−(1
÷1
)−1
÷3
]÷(−1
)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10.
2 2 29 9 9
=-7
;
(2)[15
−(1
÷1
)−1
÷3
]÷(−1
)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10.
2 2 29 9 9;
(2)[15
−(1
÷1
)−1
÷3
]÷(−1
)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10. [15
1 1 12 2 2−(1
3 3 34 4 4÷1
2 2 25 5 5)−1
3 3 34 4 4÷3
1 1 12 2 2]÷(−1
3 3 38 8 8)
=[15
-
-
]÷(−
)
=
÷(−
)
=-10.
1 1 12 2 2-
-
]÷(−
)
=
÷(−
)
=-10.
5 5 54 4 4-
]÷(−
)
=
÷(−
)
=-10.
1 1 12 2 2]÷(−
)
=
÷(−
)
=-10. ÷(−
11 11 118 8 8)
=
÷(−
)
=-10.
55 55 554 4 4÷(−
)
=-10. ÷(−
11 11 118 8 8)
=-10.
5 |
8 |
3 |
4 |
2 |
9 |
=(3.75-2.75)+(-4.625+1.625)-5
2 |
9 |
=1-3-5
2 |
9 |
=-7
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10. 3.75+(−4
5 |
8 |
3 |
4 |
2 |
9 |
=(3.75-2.75)+(-4.625+1.625)-5
2 |
9 |
=1-3-5
2 |
9 |
=-7
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
2 |
9 |
=1-3-5
2 |
9 |
=-7
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
2 |
9 |
=-7
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
2 |
9 |
(2)[15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10. [15
1 |
2 |
3 |
4 |
2 |
5 |
3 |
4 |
1 |
2 |
3 |
8 |
=[15
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
1 |
2 |
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
5 |
4 |
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
1 |
2 |
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10. ÷(−
11 |
8 |
=
55 |
4 |
11 |
8 |
=-10.
55 |
4 |
11 |
8 |
=-10. ÷(−
11 |
8 |
=-10.
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