题目内容
脱式计算.
(
×
+
)÷
÷[1-(
-
)].
(
| 1 |
| 2 |
| 1 |
| 6 |
| 5 |
| 12 |
| 1 |
| 2 |
| 7 |
| 15 |
| 4 |
| 5 |
| 2 |
| 3 |
考点:分数的四则混合运算
专题:
分析:(1)先算小括号里的乘法,再算加法,最后算括号外的除法;
(2)先算小括号里的减法,再算减法,最后算括号外的除法.
(2)先算小括号里的减法,再算减法,最后算括号外的除法.
解答:
解:(1)(
×
+
)÷
=(
+
)÷
=
÷
=1;
(2)
÷[1-(
-
)]
=
÷[1-
]
=
÷
=
.
| 1 |
| 2 |
| 1 |
| 6 |
| 5 |
| 12 |
| 1 |
| 2 |
=(
| 1 |
| 12 |
| 5 |
| 12 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 1 |
| 2 |
=1;
(2)
| 7 |
| 15 |
| 4 |
| 5 |
| 2 |
| 3 |
=
| 7 |
| 15 |
| 2 |
| 15 |
=
| 7 |
| 15 |
| 13 |
| 15 |
=
| 7 |
| 13 |
点评:本题主要考查学生依据分数四则运算计算方法正确进行计算的能力.
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