题目内容
计算:
(1)(-1.25)+1
(2)(-6)-(+6)
(3)-22×(-3)2
(4)18-(+12)+(-21)+(+12)
(5)(-23)÷(-3)×
(6)(
+
-
)×(-36)
(7)(-2
×1
-0.25×5-
)×(-1)5.
(8)(-3)×(-3
)+(+9)×(+3
)-(-12)×(-3
).
(1)(-1.25)+1
| 1 |
| 4 |
(2)(-6)-(+6)
(3)-22×(-3)2
(4)18-(+12)+(-21)+(+12)
(5)(-23)÷(-3)×
| 1 |
| 3 |
(6)(
| 1 |
| 2 |
| 5 |
| 6 |
| 7 |
| 12 |
(7)(-2
| 4 |
| 5 |
| 5 |
| 6 |
| 2 |
| 5 |
(8)(-3)×(-3
| 6 |
| 17 |
| 6 |
| 17 |
| 6 |
| 17 |
(1)原式=-1.25+1.25
=0;
(2)原式=-6-6
=-12;
(3)原式=-4×9
=-36;
(4)原式=18-12-21+12
=-3;
(5)原式=
×
=
;
(6)原式=
×(-36)+
×(-36)-
×(-36)
=-18-30+21
=-27;
(7)原式=(-
×
-
×4-
)×(-1)
=(-
-1-
)×(-1)
=
;
(8)原式=3
×(3+9-12)
=0.
=0;
(2)原式=-6-6
=-12;
(3)原式=-4×9
=-36;
(4)原式=18-12-21+12
=-3;
(5)原式=
| 23 |
| 3 |
| 1 |
| 3 |
=
| 23 |
| 9 |
(6)原式=
| 1 |
| 2 |
| 5 |
| 6 |
| 7 |
| 12 |
=-18-30+21
=-27;
(7)原式=(-
| 14 |
| 5 |
| 11 |
| 6 |
| 1 |
| 4 |
| 2 |
| 5 |
=(-
| 77 |
| 15 |
| 2 |
| 5 |
=
| 98 |
| 15 |
(8)原式=3
| 6 |
| 17 |
=0.
练习册系列答案
相关题目