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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
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| 9 |
（2）[15
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| 9 |
[15
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▼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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