题目内容
计算:
(1)(-3)2-(-3)3-22+(-22)
(2)3.25-[(-
)-(-
)+(-
)+4
]
(3)(-4)÷(-3)×45÷(-5)
(4)(-
)×
÷(-
)×(
).
(1)(-3)2-(-3)3-22+(-22)
(2)3.25-[(-
| 1 |
| 2 |
| 5 |
| 2 |
| 5 |
| 8 |
| 2 |
| 3 |
(3)(-4)÷(-3)×45÷(-5)
(4)(-
| 3 |
| 4 |
| 3 |
| 8 |
| 9 |
| 16 |
| 1 |
| 8 |
(1)原式=9-(-27)-4+(-4)
=9+27-4-4
=28;
(2)原式=3
-[(-
)+(+
)+(-
)+4
]
=3
-[2-
+4
]
=3
-5
=3
-5
=-2
;
(3)原式=(-4)×(-
)×45×(-
)
=-4×
×45×
=-12;
(4)原式=(-
)×
×(-
)×
=
.
=9+27-4-4
=28;
(2)原式=3
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 2 |
| 5 |
| 8 |
| 2 |
| 3 |
=3
| 1 |
| 4 |
| 5 |
| 8 |
| 2 |
| 3 |
=3
| 1 |
| 4 |
| 25 |
| 24 |
=3
| 6 |
| 24 |
| 25 |
| 24 |
=-2
| 19 |
| 24 |
(3)原式=(-4)×(-
| 1 |
| 3 |
| 1 |
| 5 |
=-4×
| 1 |
| 3 |
| 1 |
| 5 |
=-12;
(4)原式=(-
| 3 |
| 4 |
| 3 |
| 8 |
| 16 |
| 9 |
| 1 |
| 8 |
=
| 1 |
| 16 |
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