题目内容
脱式计算下面各题
-(
-
)÷
÷[(
+
)×
]
(
÷
+
)×
[
-(
-
)]×
.
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
| 4 |
| 5 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 7 |
(
| 5 |
| 16 |
| 3 |
| 4 |
| 15 |
| 16 |
| 8 |
| 13 |
[
| 8 |
| 15 |
| 4 |
| 5 |
| 3 |
| 10 |
| 15 |
| 14 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)先算括号内的,再算括号外的除法,最后算减法.
(2)(4)先算小括号内的,再算中括号内的,最后算括号外的.
(3)先算括号内的除法,再算括号内的加法,最后算括号外的乘法.
(2)(4)先算小括号内的,再算中括号内的,最后算括号外的.
(3)先算括号内的除法,再算括号内的加法,最后算括号外的乘法.
解答:
解:(1)
-(
-
)÷
=
-
×
=
-
=
;
(2)
÷[(
+
)×
]
=
÷[
×
]
=
÷
=
×
=
;
(3)(
÷
+
)×
=(
×
+
)×
=(
+
)×
=
×
=
;
(4)[
-(
-
)]×
=[
-
]×
=
×
=
.
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 8 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 4 |
| 9 |
(2)
| 4 |
| 5 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 7 |
=
| 4 |
| 5 |
| 7 |
| 6 |
| 4 |
| 7 |
=
| 4 |
| 5 |
| 2 |
| 3 |
=
| 4 |
| 5 |
| 3 |
| 2 |
=
| 6 |
| 5 |
(3)(
| 5 |
| 16 |
| 3 |
| 4 |
| 15 |
| 16 |
| 8 |
| 13 |
=(
| 5 |
| 16 |
| 4 |
| 3 |
| 15 |
| 16 |
| 8 |
| 13 |
=(
| 5 |
| 12 |
| 15 |
| 16 |
| 8 |
| 13 |
=
| 65 |
| 48 |
| 8 |
| 13 |
=
| 5 |
| 6 |
(4)[
| 8 |
| 15 |
| 4 |
| 5 |
| 3 |
| 10 |
| 15 |
| 14 |
=[
| 8 |
| 15 |
| 1 |
| 2 |
| 15 |
| 14 |
=
| 1 |
| 30 |
| 15 |
| 14 |
=
| 1 |
| 28 |
点评:此题考查了分数的四则混合运算,注意运算顺序和运算法则.
练习册系列答案
相关题目