题目内容
| 脱式计算. 10÷
|
| ||||||||||||||
2-
|
|
分析:(1)(2)(4)依据四则运算计算方法,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解答,
(3)运用减法性质解答.
(3)运用减法性质解答.
解答:解:(1)10÷
+
×4,
=18+
,
=18
;
(2)
×
÷(
-
),
=
×
÷
,
=
÷
,
=
;
(3)2-
÷
-
,
=2-
-
,
=2-(
+
),
=2-2,
=0;
(4)
×(
+
)+
,
=
×
+
,
=
+
,
=4.6.
| 5 |
| 9 |
| 1 |
| 6 |
=18+
| 2 |
| 3 |
=18
| 2 |
| 3 |
(2)
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 15 |
=
| 1 |
| 9 |
| 4 |
| 15 |
=
| 5 |
| 12 |
(3)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2,
=0;
(4)
| 12 |
| 5 |
| 5 |
| 6 |
| 3 |
| 4 |
| 4 |
| 5 |
=
| 12 |
| 5 |
| 19 |
| 12 |
| 4 |
| 5 |
=
| 19 |
| 5 |
| 4 |
| 5 |
=4.6.
点评:本题主要考查学生对于四则运算计算方法,以及减法性质掌握情况.
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