题目内容
计算.
(1)(-
)×5×(-1
)×(-0.2);
(2)(-12)×(
-
).
(1)(-
| 4 |
| 7 |
| 3 |
| 4 |
(2)(-12)×(
| 1 |
| 4 |
| 1 |
| 3 |
(1)(-
)×5×(-1
)×(-0.2),
=-
×5×
×
,
=-1;
(2)(-12)×(
-
),
=
×(-12)-
×(-12),
=-3+4,
=1.
| 4 |
| 7 |
| 3 |
| 4 |
=-
| 4 |
| 7 |
| 7 |
| 4 |
| 1 |
| 5 |
=-1;
(2)(-12)×(
| 1 |
| 4 |
| 1 |
| 3 |
=
| 1 |
| 4 |
| 1 |
| 3 |
=-3+4,
=1.
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