题目内容
计算
(1)
-
+
-0.25-3.75-4.5
(2)(-5.2)+3.8-{(-1.2)-[(-0.5)-(-0.77)]}
(3)[
-(
+
-
)•24]÷5
(4)-0.252÷
-3.75×24
(5)
(6)1+2-3-4+5+6-7-8+9+10-11-12+…+1993+1994-1995-1996+1997.
(1)
| 3 |
| 2 |
| 5 |
| 4 |
| 15 |
| 4 |
(2)(-5.2)+3.8-{(-1.2)-[(-0.5)-(-0.77)]}
(3)[
| 25 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
(4)-0.252÷
| 1 |
| 2 |
(5)
(-2)3×(-1)5-7÷|-(-
| ||
| 0.25×8+|-32×(-2)| |
(6)1+2-3-4+5+6-7-8+9+10-11-12+…+1993+1994-1995-1996+1997.
(1)原式=1.5-1.5-4.5,
=0-4.5
=-4.5;
(2)原式=-5.2+3.8-(-1.2+0.5-0.77)
=-5.2+3.8+1.2-0.5+0.77
=-5.7+5+0.77
=0.07;
(3)原式=(
-
×24-
×24+
×24 )÷5
=(
-9-4+18 )÷5
=(
+5 )÷5
=
+1=
;
(4)原式=-
×2-
×24
=-
-90
=-90
;
(5)原式=
=
=-1;
(6)原式=(-4 )×1996÷4+1997
=-1996+1997
=1.
=0-4.5
=-4.5;
(2)原式=-5.2+3.8-(-1.2+0.5-0.77)
=-5.2+3.8+1.2-0.5+0.77
=-5.7+5+0.77
=0.07;
(3)原式=(
| 25 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=(
| 25 |
| 24 |
=(
| 25 |
| 24 |
=
| 5 |
| 24 |
| 29 |
| 24 |
(4)原式=-
| 1 |
| 16 |
| 15 |
| 4 |
=-
| 1 |
| 8 |
=-90
| 1 |
| 8 |
(5)原式=
8-7÷
| ||
| 2+18 |
=
| -20 |
| 20 |
=-1;
(6)原式=(-4 )×1996÷4+1997
=-1996+1997
=1.
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