题目内容
(1)计算:3
-
+2
-
.
(2)计算:(2
-
)2-(2
+
)2.
(3)
.
(4)(
)
×(
)-
×(
)
(5)
×
÷
(6)(
-2
)×
-6
(7)
×
÷
+
;
(8)5-
×5
+(2
÷3
)-3(结果用幂的形式表示)
| 7 |
| 1 |
| 2 |
| 7 |
| 7 |
| 3 |
| 2 |
| 7 |
(2)计算:(2
| 2 |
| 7 |
| 8 |
| 2 |
| 7 |
| 8 |
(3)
-(
|
(4)(
| 1 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 25 |
| 1 |
| 2 |
(5)
| 6 | 42 |
| 8 |
| 6 | 2 |
(6)(
| 6 |
| 15 |
| 3 |
|
(7)
| 2 |
| 3 |
| 1 | ||
|
(-3)2+(
|
(8)5-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
(1)原式=3
;
(2)原式=(2
-
+2
+
)(2
-
-2
-
)=4
×(-
)=-7
;
(3)原式=-
=
=4;
(4)原式=
×
×
=
=
;
(5)原式=4
×2×2
÷2
=2
×2×2
÷2
=2
+1+
-
=22=4;
(6)原式=
-2
-3
=3
-6
-3
=-6
;
(7)原式=
×
×
+
=2
+4;
(8)原式=5-
+
+(
)
=50+
=1+
.
| 7 |
(2)原式=(2
| 2 |
| 7 |
| 8 |
| 2 |
| 7 |
| 8 |
| 2 |
| 7 |
| 8 |
| 2 |
| 7 |
| 8 |
| 2 |
| 7 |
| 4 |
| 2 |
(3)原式=-
| -3+19 |
| 16 |
(4)原式=
|
|
|
|
| 1 |
| 5 |
(5)原式=4
| 2 |
| 6 |
| 1 |
| 2 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
(6)原式=
| 6×3 |
| 15×3 |
| 2 |
| 2 |
| 5 |
| 2 |
| 5 |
(7)原式=
| 2 |
| 3 |
| 2 |
| 9+7 |
| 3 |
(8)原式=5-
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
3
| ||
2
|
3
| ||
2
|
练习册系列答案
相关题目