题目内容
计算下面各题.(能简算的要简算)
(1)
÷
×
(2)
×
+
(3)36×(
-
)
(4)
×16+
÷
(5)
÷[(
-
)×
].
(1)
| 5 |
| 6 |
| 10 |
| 13 |
| 6 |
| 7 |
(2)
| 4 |
| 15 |
| 5 |
| 8 |
| 3 |
| 8 |
(3)36×(
| 7 |
| 9 |
| 5 |
| 12 |
(4)
| 7 |
| 13 |
| 7 |
| 13 |
| 1 |
| 10 |
(5)
| 7 |
| 10 |
| 4 |
| 5 |
| 1 |
| 3 |
| 6 |
| 5 |
考点:分数的四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)(2)按照从左到右顺序计算解答,
(3)(4)运用乘法分配律解答,
(5)按照先算小括号里面的,再算中括号里面的,最后算括号外面的顺序计算解答.
(3)(4)运用乘法分配律解答,
(5)按照先算小括号里面的,再算中括号里面的,最后算括号外面的顺序计算解答.
解答:
解:(1)
÷
×
=
×
=
;
(2)
×
+
=
+
=
;
(3)36×(
-
)
=36×
-36×
=28-15
=13;
(4)
×16+
÷
=
×(16+10)
=
×26
=14;
(5)
÷[(
-
)×
]
=
÷[
×
]
=
÷
=1
.
| 5 |
| 6 |
| 10 |
| 13 |
| 6 |
| 7 |
=
| 13 |
| 12 |
| 6 |
| 7 |
=
| 13 |
| 14 |
(2)
| 4 |
| 15 |
| 5 |
| 8 |
| 3 |
| 8 |
=
| 1 |
| 6 |
| 3 |
| 8 |
=
| 13 |
| 24 |
(3)36×(
| 7 |
| 9 |
| 5 |
| 12 |
=36×
| 7 |
| 9 |
| 5 |
| 12 |
=28-15
=13;
(4)
| 7 |
| 13 |
| 7 |
| 13 |
| 1 |
| 10 |
=
| 7 |
| 13 |
=
| 7 |
| 13 |
=14;
(5)
| 7 |
| 10 |
| 4 |
| 5 |
| 1 |
| 3 |
| 6 |
| 5 |
=
| 7 |
| 10 |
| 7 |
| 15 |
| 6 |
| 5 |
=
| 7 |
| 10 |
| 14 |
| 25 |
=1
| 1 |
| 4 |
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题,是本题考查知识点.
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