题目内容
计算.
(1)4
-
+0.125
(2)2
÷
×
(3)
×
+
×(
+
).
(1)4
| 11 |
| 12 |
| 7 |
| 8 |
(2)2
| 5 |
| 6 |
| 34 |
| 9 |
| 1 |
| 18 |
(3)
| 9 |
| 28 |
| 7 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 6 |
分析:(1)按照从左向右的顺序进行计算;
(2)按照从左向右的顺序进行计算
(3)根据乘法分配律进行简算.
(2)按照从左向右的顺序进行计算
(3)根据乘法分配律进行简算.
解答:解:
(1)4
-
+0.125,
=4
+0.125,
=4
;
(2)2
÷
×
,
=
×
,
=
;
(3)
×
+
×(
+
),
=
×
+
×
+
×
,
=
+
+
,
=1+
,
=1
.
(1)4
| 11 |
| 12 |
| 7 |
| 8 |
=4
| 1 |
| 24 |
=4
| 1 |
| 6 |
(2)2
| 5 |
| 6 |
| 34 |
| 9 |
| 1 |
| 18 |
=
| 3 |
| 4 |
| 1 |
| 18 |
=
| 1 |
| 24 |
(3)
| 9 |
| 28 |
| 7 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 6 |
=
| 9 |
| 28 |
| 7 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 9 |
=1+
| 5 |
| 9 |
=1
| 5 |
| 9 |
点评:考查了分数和小数四则混合运算.注意运算顺序和运算法则,然后再进一步计算.
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