题目内容
计算:
(1)(-14)+(+19)+(-6)+(+31)+(-19)
(2)23×(-5)-(-3)÷
(3)-23+[(-4)2-(1-32)×3]
(4)[1
-(
+
-
)×24]÷(-5).
(1)(-14)+(+19)+(-6)+(+31)+(-19)
(2)23×(-5)-(-3)÷
| 3 |
| 128 |
(3)-23+[(-4)2-(1-32)×3]
(4)[1
| 1 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
(1)原式=-20+31
=11;
(2)原式=-115+128
=13;
(3)原式=-8+16-(-8)×3
=-8+16+24
=32;
(4)原式=(1
-9-4+18)×(-
)
=
×(-
)+5×(-
)
=-
-1
=-1
.
=11;
(2)原式=-115+128
=13;
(3)原式=-8+16-(-8)×3
=-8+16+24
=32;
(4)原式=(1
| 1 |
| 24 |
| 1 |
| 5 |
=
| 25 |
| 24 |
| 1 |
| 5 |
| 1 |
| 5 |
=-
| 5 |
| 24 |
=-1
| 5 |
| 24 |
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