题目内容
计算.
(1)35×(1-
|
(2)42×(
|
(3)26÷(
| ||||||||||||||||||
(4)
|
(5)
|
(6)
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)(2)(5)运用乘法分配律解答,
(3)按照先算括号里面的,再算括号外面的顺序计算即可解答,
(4)运用乘法交换律即可解答,
(6)按照从左到右顺序计算即可解答.
(3)按照先算括号里面的,再算括号外面的顺序计算即可解答,
(4)运用乘法交换律即可解答,
(6)按照从左到右顺序计算即可解答.
解答:
解:(1)35×(1-
)
=35-35×
=35-15
=20;
(2)42×(
+
)
=42×
+42×
=30+7
=37;
(3)26÷(
+
)
=26÷
=84;
(4)
×
÷
=
×
×
=
×
=
;
(5)
-
×
=
×(1-
)
=
×
=
;
(6)
÷
×
=
×
=
.
| 3 |
| 7 |
=35-35×
| 3 |
| 7 |
=35-15
=20;
(2)42×(
| 5 |
| 7 |
| 1 |
| 6 |
=42×
| 5 |
| 7 |
| 1 |
| 6 |
=30+7
=37;
(3)26÷(
| 1 |
| 6 |
| 1 |
| 7 |
=26÷
| 13 |
| 42 |
=84;
(4)
| 11 |
| 7 |
| 3 |
| 8 |
| 22 |
| 7 |
=
| 11 |
| 7 |
| 7 |
| 22 |
| 3 |
| 8 |
=
| 1 |
| 2 |
| 3 |
| 8 |
=
| 3 |
| 16 |
(5)
| 8 |
| 9 |
| 8 |
| 9 |
| 3 |
| 4 |
=
| 8 |
| 9 |
| 3 |
| 4 |
=
| 8 |
| 9 |
| 1 |
| 4 |
=
| 2 |
| 9 |
(6)
| 12 |
| 25 |
| 3 |
| 5 |
| 4 |
| 7 |
=
| 4 |
| 5 |
| 4 |
| 7 |
=
| 16 |
| 35 |
点评:本题考查知识点:(1)依据四则运算计算方法正确进行计算,(2)运用简便方法解决问题.
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