题目内容
| 4 |
| 9 |
| 4 |
| 5 |
| 11 |
| 20 |
| 1 |
| 9 |
| 1 |
| 6 |
| 1 |
| 8 |
(1+25%)÷(1-
| 3 |
| 4 |
1-
| 9 |
| 16 |
| 3 |
| 4 |
| 8 |
| 9 |
分析:(1)按照先算括号里面的减法,再按照从左到右顺序解答,
(2)按照先同时计算乘法,再算加法顺序解答,
(3)按照先同时计算括号里面的,再算除法顺序解答,
(4)按照先算除法,再算除法,最后算减法顺序解答.
(2)按照先同时计算乘法,再算加法顺序解答,
(3)按照先同时计算括号里面的,再算除法顺序解答,
(4)按照先算除法,再算除法,最后算减法顺序解答.
解答:解:(1)
×(
-
)÷
=
×
÷
=
÷
=1;
(2)
×60%+
×40%
=
+
=
;
(3)(1+25%)÷(1-
)
=125%÷
=5;
(4)1-
÷
×
=1-
×
=1-
=
.
| 4 |
| 9 |
| 4 |
| 5 |
| 11 |
| 20 |
| 1 |
| 9 |
=
| 4 |
| 9 |
| 1 |
| 4 |
| 1 |
| 9 |
=
| 1 |
| 9 |
| 1 |
| 9 |
=1;
(2)
| 1 |
| 6 |
| 1 |
| 8 |
=
| 1 |
| 10 |
| 1 |
| 20 |
=
| 3 |
| 20 |
(3)(1+25%)÷(1-
| 3 |
| 4 |
=125%÷
| 1 |
| 4 |
=5;
(4)1-
| 9 |
| 16 |
| 3 |
| 4 |
| 8 |
| 9 |
=1-
| 3 |
| 4 |
| 8 |
| 9 |
=1-
| 2 |
| 3 |
=
| 1 |
| 3 |
点评:依据四则运算计算方法正确进行计算,是本题考查知识点.
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