题目内容
|
18÷
| ||||||||||||||||
(1+
|
(
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|
|
分析:依据四则运算顺序:先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的顺序解答,
(4)运用乘法分配律解答即可.
(4)运用乘法分配律解答即可.
解答:解:(1)
×[15×(
-
)+
],
=
×[15×
+
],
=
×[
+
],
=
×
,
=
;
(2)18÷
-(
+
)×
,
=18÷
-
×
,
=21-
,
=20
;
(3)(1+
+
÷
)×
,
=(1+
+
)×
,
=
×
,
=
;
(4)(
×101-
)÷(150+30÷
),
=(101-1)×
÷(150+450),
=6+600,
=606;
(5)
÷[(
+
)×(1÷
)],
=
÷[
×
],
=
÷
,
=1;
(6)
÷
×
÷
,
=
×
÷
,
=
÷
,
=
.
| 4 |
| 7 |
| 1 |
| 3 |
| 3 |
| 10 |
| 7 |
| 8 |
=
| 4 |
| 7 |
| 1 |
| 30 |
| 7 |
| 8 |
=
| 4 |
| 7 |
| 1 |
| 2 |
| 7 |
| 8 |
=
| 4 |
| 7 |
| 11 |
| 8 |
=
| 11 |
| 14 |
(2)18÷
| 6 |
| 7 |
| 1 |
| 4 |
| 2 |
| 7 |
| 9 |
| 11 |
=18÷
| 6 |
| 7 |
| 15 |
| 28 |
| 9 |
| 11 |
=21-
| 135 |
| 308 |
=20
| 173 |
| 308 |
(3)(1+
| 5 |
| 7 |
| 1 |
| 2 |
| 3 |
| 4 |
| 2 |
| 7 |
=(1+
| 5 |
| 7 |
| 2 |
| 3 |
| 2 |
| 7 |
=
| 50 |
| 21 |
| 2 |
| 7 |
=
| 100 |
| 147 |
(4)(
| 3 |
| 50 |
| 3 |
| 50 |
| 1 |
| 15 |
=(101-1)×
| 3 |
| 50 |
=6+600,
=606;
(5)
| 3 |
| 4 |
| 1 |
| 16 |
| 1 |
| 20 |
| 3 |
| 20 |
=
| 3 |
| 4 |
| 9 |
| 80 |
| 20 |
| 3 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=1;
(6)
| 1 |
| 5 |
| 2 |
| 3 |
| 5 |
| 24 |
| 7 |
| 12 |
=
| 3 |
| 10 |
| 5 |
| 24 |
| 7 |
| 12 |
=
| 1 |
| 16 |
| 7 |
| 12 |
=
| 3 |
| 28 |
点评:本题考查知识点:(1)依据四则运算顺序正确进行计算,(2)运用乘法分配律解决问题.
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