题目内容
计算:
(1)(-2)×
×(-
)×(-
);(2)(-6)×5×(-
)×
;
(3)(-4)×7×(-1)×(-0.25);(4)(-
)×
×(-
)×
(1)(-2)×
| 5 |
| 4 |
| 9 |
| 10 |
| 2 |
| 3 |
| 7 |
| 6 |
| 2 |
| 7 |
(3)(-4)×7×(-1)×(-0.25);(4)(-
| 5 |
| 24 |
| 8 |
| 15 |
| 3 |
| 2 |
| 1 |
| 4 |
(1)(-2)×
×(-
)×(-
)=-(2×
×
×
)=-
;
(2)(-6)×5×(-
)×
=6×5×
×
=10;
(3)(-4)×7×(-1)×(-0.25)=-(4×7×1×
)=-7;
(4)(-
)×
×(-
)×
=
×
×
×
=
.
| 5 |
| 4 |
| 9 |
| 10 |
| 2 |
| 3 |
| 5 |
| 4 |
| 9 |
| 10 |
| 2 |
| 3 |
| 3 |
| 2 |
(2)(-6)×5×(-
| 7 |
| 6 |
| 2 |
| 7 |
| 7 |
| 6 |
| 2 |
| 7 |
(3)(-4)×7×(-1)×(-0.25)=-(4×7×1×
| 1 |
| 4 |
(4)(-
| 5 |
| 24 |
| 8 |
| 15 |
| 3 |
| 2 |
| 1 |
| 4 |
| 5 |
| 24 |
| 8 |
| 15 |
| 3 |
| 2 |
| 1 |
| 4 |
| 1 |
| 24 |
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