题目内容
计算(1)(-
)-(-3
)+(+2
)-(+5
).
(2)(-6)÷(-0.25)×
.
(3)-2+(1-0.2÷
)×(-3).
(4)-14-
×[2-(-3)2].
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
(2)(-6)÷(-0.25)×
| 11 |
| 24 |
(3)-2+(1-0.2÷
| 3 |
| 5 |
(4)-14-
| 1 |
| 6 |
(1)(-
)-(-3
)+(+2
)-(+5
)
=(-
)+3
+2
+(-5
)
=[(-
)+(-5
)]+(3
+2
)
=(-6)+6
=0;
(2)(-6)÷(-0.25)×
=(-6)×(-4)×
=24×
=11;
(3)-2+(1-0.2÷
)×(-3)
=-2+(1-
×
)×(-3)
=-2+
×(-3)
=-2+(-2)
=-4;
(4)-14-
×[2-(-3)2]
=-1-
×[2+(-9)]
=-1-
×(-7)
=-1+
=
.
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
=(-
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
=[(-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
=(-6)+6
=0;
(2)(-6)÷(-0.25)×
| 11 |
| 24 |
=(-6)×(-4)×
| 11 |
| 24 |
=24×
| 11 |
| 24 |
=11;
(3)-2+(1-0.2÷
| 3 |
| 5 |
=-2+(1-
| 1 |
| 5 |
| 5 |
| 3 |
=-2+
| 2 |
| 3 |
=-2+(-2)
=-4;
(4)-14-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
练习册系列答案
相关题目