题目内容
计算.(能简算的要用简便方法计算)
|
23×
|
(
| ||||||||||||||||||||||
|
(
|
|
分析:(1)(2)(3)(4)运用乘法分配律解答,
(6)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即可解答,
(5)按照先算括号里面的,再从左到右顺序计算即可解答.
(6)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即可解答,
(5)按照先算括号里面的,再从左到右顺序计算即可解答.
解答:解:(1)
÷8+
×
=(
+
)×
=1×
=
;
(2)23×
+14×
=(23+16)×
=39×
=14;
(3)(
-
+
)÷
=
×36-
×36+
×36
=34-27+6
=13;
(4)
÷[﹙
+
﹚×16]
=
÷[
×16+
×16]
=
÷[8+2]
=
÷10
=
;
(5)(
-
)×
÷
=
×
÷
=
÷
=
;
(6)
÷[(
+
)÷
]
=
÷[
÷
]
=
÷
=
.
| 5 |
| 7 |
| 1 |
| 8 |
| 2 |
| 7 |
=(
| 5 |
| 7 |
| 2 |
| 7 |
| 1 |
| 8 |
=1×
| 1 |
| 8 |
=
| 1 |
| 8 |
(2)23×
| 14 |
| 39 |
| 16 |
| 39 |
=(23+16)×
| 14 |
| 39 |
=39×
| 14 |
| 39 |
=14;
(3)(
| 17 |
| 18 |
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 36 |
=
| 17 |
| 18 |
| 3 |
| 4 |
| 1 |
| 6 |
=34-27+6
=13;
(4)
| 5 |
| 7 |
| 1 |
| 2 |
| 1 |
| 8 |
=
| 5 |
| 7 |
| 1 |
| 2 |
| 1 |
| 8 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
=
| 1 |
| 14 |
(5)(
| 4 |
| 5 |
| 2 |
| 7 |
| 1 |
| 2 |
| 9 |
| 14 |
=
| 18 |
| 35 |
| 1 |
| 2 |
| 9 |
| 14 |
=
| 9 |
| 35 |
| 9 |
| 14 |
=
| 2 |
| 5 |
(6)
| 11 |
| 13 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
=
| 11 |
| 13 |
| 11 |
| 8 |
| 5 |
| 8 |
=
| 11 |
| 13 |
| 11 |
| 5 |
=
| 5 |
| 13 |
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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