题目内容
计算:
(1)2+(-4)-(-2)+4
(2)2÷(1-
)×(-
)
(3)5-(-2)2×2
(4)(
-
-
)×(-48)
(1)2+(-4)-(-2)+4
(2)2÷(1-
| 1 |
| 3 |
| 2 |
| 3 |
(3)5-(-2)2×2
(4)(
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
(1)2+(-4)-(-2)+4=2-4+2+4=4;
(2)2÷(1-
)×(-
)=2÷
×(-
)=2×
×(-
)=-2;
(3)5-(-2)2×2=5-4×2=5-8=-3;
(4)(
-
-
)×(-48)=
×(-48)-
×(-48)-
×(-48)=-36+8+4=-24;
(2)2÷(1-
| 1 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 2 |
| 3 |
(3)5-(-2)2×2=5-4×2=5-8=-3;
(4)(
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
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