
计算:(1)-24-(10-15)(2)(-7)+(+6)-(+9)-(-4)(3)1-(?12)+(?13)-16(4)(-478)-(-
计算:(1)-24-(10-15)(2)(-7)+(+6)-(+9)-(-4)(3)1-(?12)+(?13)-16(4)(-478)-(-512)+(-414)-318...
计算:(1)-24-(10-15)(2)(-7)+(+6)-(+9)-(-4)(3)1-(?12)+(?13)-16(4)(-478)-(-512)+(-414)-318.
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(1)原式=-24-(-5)
=-24+5
=-19;
(2)原式=-7+6-9+4
=-7-9+6+4
=-16+10
=-6;
(3)原式=1+
-
-
=
+
-
-
=1;
(4)原式=-4
+5
-4
-3
=-4
-3
+5
-4
=-8+
-
=-8+1
=-7.
=-24+5
=-19;
(2)原式=-7+6-9+4
=-7-9+6+4
=-16+10
=-6;
(3)原式=1+
1 |
2 |
1 |
3 |
1 |
6 |
=
6 |
6 |
3 |
6 |
2 |
6 |
1 |
6 |
=1;
(4)原式=-4
7 |
8 |
1 |
2 |
1 |
4 |
1 |
8 |
=-4
7 |
8 |
1 |
8 |
1 |
2 |
1 |
4 |
=-8+
22 |
4 |
17 |
4 |
=-8+1
=-7.
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