题目内容
| 我来脱式计算 12×
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分析:横向数:
(1)(3)(4)(5)按照从左到右顺序解答,
(2)按照先算除法,再算加法顺序解答,
(6)按照先算括号里面的,再算括号外面的顺序解答.
(1)(3)(4)(5)按照从左到右顺序解答,
(2)按照先算除法,再算加法顺序解答,
(6)按照先算括号里面的,再算括号外面的顺序解答.
解答:解:12×
÷
=4÷
=6;
+
÷
=
+
=1;
×9÷
=
÷
=1;
×
÷
=
÷
=
;
÷
÷
=
÷
=1
;
÷(1-
)
=
÷
=
.
| 1 |
| 3 |
| 2 |
| 3 |
=4÷
| 2 |
| 3 |
=6;
| 1 |
| 7 |
| 5 |
| 7 |
| 5 |
| 6 |
=
| 1 |
| 7 |
| 6 |
| 7 |
=1;
| 1 |
| 15 |
| 3 |
| 5 |
=
| 3 |
| 5 |
| 3 |
| 5 |
=1;
| 5 |
| 8 |
| 4 |
| 7 |
| 5 |
| 7 |
=
| 5 |
| 14 |
| 5 |
| 7 |
=
| 1 |
| 2 |
| 7 |
| 9 |
| 2 |
| 3 |
| 7 |
| 8 |
=
| 7 |
| 6 |
| 7 |
| 8 |
=1
| 1 |
| 3 |
| 3 |
| 10 |
| 1 |
| 10 |
=
| 3 |
| 10 |
| 9 |
| 10 |
=
| 1 |
| 3 |
点评:本题主要考查学生依据四则运算计算方法正确进行计算的能力,关键是计算结果要准确.
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