题目内容
计算.
(1)0-(-3).
(2)(-16)-(-18)-(-12)-24;
(3)23-36-(-76)-(-105);
(4)(-32)-87-(-72)-(-27).
(5)2.75-(-8.5)-1.5-2.75.
(6)(-
)-(-1
)-(-1
)-(+1.75);
(7)|-23|-(-15)-|4
-(-2
)|.
(1)0-(-3).
(2)(-16)-(-18)-(-12)-24;
(3)23-36-(-76)-(-105);
(4)(-32)-87-(-72)-(-27).
(5)2.75-(-8.5)-1.5-2.75.
(6)(-
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
(7)|-23|-(-15)-|4
| 1 |
| 3 |
| 2 |
| 3 |
(1)原式=0+3
=3;
(2)原式=(-16)+18+12+(-24)
=-16+18+12-24
=10;
(3)原式=23+(-36)+76+105
=23+76+105-36
=168;
(4)原式=(-32)+(-87)+72+27
=-119+99
=-20;
(5)原式=2.75+8.5-1.5-2.75
=11.25-4.25
=7;
(6)原式=-
+1
+1
-1.75
=1;
(7)原式=23+15-9
=31.
=3;
(2)原式=(-16)+18+12+(-24)
=-16+18+12-24
=10;
(3)原式=23+(-36)+76+105
=23+76+105-36
=168;
(4)原式=(-32)+(-87)+72+27
=-119+99
=-20;
(5)原式=2.75+8.5-1.5-2.75
=11.25-4.25
=7;
(6)原式=-
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
=1;
(7)原式=23+15-9
=31.
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