题目内容
计算
(1)1+(-2)+|-2-3|-5-(-9)
(2)
×(
-
)×
÷
(3)(
+
-
)×(-12)
(4)0.25×(-2)3-[4÷(-
)2+1]+(-1)5.
(1)1+(-2)+|-2-3|-5-(-9)
(2)
| 11 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 11 |
| 5 |
| 4 |
(3)(
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
(4)0.25×(-2)3-[4÷(-
| 2 |
| 3 |
(1)1+(-2)+|-2-3|-5-(-9)
=1-2+5-5+9
=-1+0+9
=8;
(2)
×(
-
)×
÷
=
×(-
)×
×
=
×
×(-
)×
=1×(-
)
=-
;
(3)(
+
-
)×(-12)
=-
×12-
×12+
×12
=-5-8+9
=-4;
(4)0.25×(-2)3-[4÷(-
)2+1]+(-1)5
=-0.25×8-[4×
+1]-1
=-2-[9+1]-1
=-2-10-1
=-13.
=1-2+5-5+9
=-1+0+9
=8;
(2)
| 11 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 11 |
| 5 |
| 4 |
=
| 11 |
| 3 |
| 1 |
| 6 |
| 3 |
| 11 |
| 4 |
| 5 |
=
| 11 |
| 3 |
| 11 |
| 3 |
| 1 |
| 6 |
| 4 |
| 5 |
=1×(-
| 2 |
| 15 |
=-
| 2 |
| 15 |
(3)(
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
=-
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
=-5-8+9
=-4;
(4)0.25×(-2)3-[4÷(-
| 2 |
| 3 |
=-0.25×8-[4×
| 9 |
| 4 |
=-2-[9+1]-1
=-2-10-1
=-13.
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