题目内容
计算:
(1)(
-
-
)÷(-
)
(2)
÷[-
×(-1
)-0.25]×(-2
)
(3)-14-{(-3)2-[3+0.4×(-1
)]÷(-2)3}.
(1)(
| 5 |
| 12 |
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 36 |
(2)
| 5 |
| 6 |
| 8 |
| 21 |
| 3 |
| 4 |
| 2 |
| 5 |
(3)-14-{(-3)2-[3+0.4×(-1
| 1 |
| 2 |
(1)(
-
-
)÷(-
)
=(
-
-
)×(-36)
=
×(-36)-
×(-36)-
×(-36)
=-15+28+24
=-15+52
=37;
(2)
÷[-
×(-1
)-0.25]×(-2
)
=
÷[-
×(-
)-
]×(-
)
=
÷(
-
)×(-
)
=
×
×(-
)
=-
;
(3)-14-{(-3)2-[3+0.4×(-1
)]÷(-2)3}
=-1-{9-[3+
×(-
)]÷(-8)}
=-1-[9-(3-
)×(-
)]
=-1-[9-
×(-
)]
=-1-(9+
)
=(-1)+(-9
)
=-10
.
| 5 |
| 12 |
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 36 |
=(
| 5 |
| 12 |
| 7 |
| 9 |
| 2 |
| 3 |
=
| 5 |
| 12 |
| 7 |
| 9 |
| 2 |
| 3 |
=-15+28+24
=-15+52
=37;
(2)
| 5 |
| 6 |
| 8 |
| 21 |
| 3 |
| 4 |
| 2 |
| 5 |
=
| 5 |
| 6 |
| 8 |
| 21 |
| 7 |
| 4 |
| 1 |
| 4 |
| 12 |
| 5 |
=
| 5 |
| 6 |
| 2 |
| 3 |
| 1 |
| 4 |
| 12 |
| 5 |
=
| 5 |
| 6 |
| 12 |
| 5 |
| 12 |
| 5 |
=-
| 24 |
| 5 |
(3)-14-{(-3)2-[3+0.4×(-1
| 1 |
| 2 |
=-1-{9-[3+
| 2 |
| 5 |
| 3 |
| 2 |
=-1-[9-(3-
| 3 |
| 5 |
| 1 |
| 8 |
=-1-[9-
| 12 |
| 5 |
| 1 |
| 8 |
=-1-(9+
| 3 |
| 10 |
=(-1)+(-9
| 3 |
| 10 |
=-10
| 3 |
| 10 |
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