题目内容
计算
(1)(-38)+52+118+(-62)
(2)(-3
)-(-2
)-(-1
)-(+1.75)
(3)|-
|÷(
-
)-
×(-4)2
(4)-22÷
-[22-(1-
×
)]×12.
(1)(-38)+52+118+(-62)
(2)(-3
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
(3)|-
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
(4)-22÷
| 4 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
(1)(-38)+52+118+(-62)
=(-38-62)+(52+118)
=-100+170
=70;
(2)(-3
)-(-2
)-(-1
)-(+1.75)
=(-3
+1
)+(2.75-1.75)
=-1+1
=0;
(3)|-
|÷(
-
)-
×(-4)2
=
÷
-
×16
=
-
=-3
;
(4)-22÷
-[22-(1-
×
)]×12
=-4÷
-[4-(1-
)]×12
=-3-[4-
]×12
=-3-
×12
=-3-38
=-41.
=(-38-62)+(52+118)
=-100+170
=70;
(2)(-3
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
=(-3
| 2 |
| 3 |
| 2 |
| 3 |
=-1+1
=0;
(3)|-
| 7 |
| 9 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 3 |
=
| 7 |
| 9 |
| 7 |
| 15 |
| 1 |
| 3 |
=
| 5 |
| 3 |
| 16 |
| 3 |
=-3
| 2 |
| 3 |
(4)-22÷
| 4 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=-4÷
| 4 |
| 3 |
| 1 |
| 6 |
=-3-[4-
| 5 |
| 6 |
=-3-
| 19 |
| 6 |
=-3-38
=-41.
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