题目内容
计算下列各题:
(1)(-15)×(-1
)
(2)0-1
×3
(3)(-3
)×(+
)
(4)(-18)×(
)-14×(-1
)
(5)(
)×(+1
)×(-2
)×(-3
).
(1)(-15)×(-1
| 2 |
| 3 |
(2)0-1
| 1 |
| 3 |
(3)(-3
| 1 |
| 3 |
| 3 |
| 5 |
(4)(-18)×(
| 5 |
| 6 |
| 1 |
| 7 |
(5)(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 3 |
| 5 |
(1)(-15)×(-1
)=-15×(-
)=25;
(2)0-1
×3=0-4=-4;
(3)(-3
)×(+
)=-
×
=-2;
(4)(-18)×(
)-14×(-1
)=-15-14×(-
)=1;
(5)(
)×(+1
)×(-2
)×(-3
)=
×
×(-
)×(-
)=
.
| 2 |
| 3 |
| 5 |
| 3 |
(2)0-1
| 1 |
| 3 |
(3)(-3
| 1 |
| 3 |
| 3 |
| 5 |
| 10 |
| 3 |
| 3 |
| 5 |
(4)(-18)×(
| 5 |
| 6 |
| 1 |
| 7 |
| 8 |
| 7 |
(5)(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 3 |
| 5 |
| 1 |
| 2 |
| 4 |
| 3 |
| 9 |
| 4 |
| 18 |
| 5 |
| 27 |
| 5 |
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