题目内容
计算:
(1)(-15)+(-6)-(-25)
(2)-12002-(1+0.5)×
÷(-4)
(1)(-15)+(-6)-(-25)
(2)-12002-(1+0.5)×
1 |
3 |
(1)原式=-15-6+25
=4;
(2)原式=-1-
×
×(-
)
=-1+
=-
.
=4;
(2)原式=-1-
3 |
2 |
1 |
3 |
1 |
4 |
=-1+
1 |
8 |
=-
7 |
8 |
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