题目内容
用你喜欢的方法计算.
×
×
÷
×
×
+
×
11-
-
-
.
| 5 |
| 9 |
| 3 |
| 5 |
| 5 |
| 8 |
| 1 |
| 2 |
| 2 |
| 15 |
| 1 |
| 5 |
| 2 |
| 7 |
| 2 |
| 5 |
| 3 |
| 5 |
| 2 |
| 7 |
11-
| 3 |
| 11 |
| 7 |
| 11 |
| 1 |
| 11 |
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;
(4)根据减法的性质进行简算.
(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;
(4)根据减法的性质进行简算.
解答:解:(1)
×
×
,
=
×
,
=
;
(2)
÷
×
,
=
×
,
=
;
(3)
×
+
×
,
=
×(
+
),
=
×1,
=
;
(4)11-
-
-
,
=11-(
+
+
),
=11-1,
=10.
| 5 |
| 9 |
| 3 |
| 5 |
| 5 |
| 8 |
=
| 1 |
| 3 |
| 5 |
| 8 |
=
| 5 |
| 24 |
(2)
| 1 |
| 2 |
| 2 |
| 15 |
| 1 |
| 5 |
=
| 15 |
| 4 |
| 1 |
| 5 |
=
| 3 |
| 4 |
(3)
| 2 |
| 7 |
| 2 |
| 5 |
| 3 |
| 5 |
| 2 |
| 7 |
=
| 2 |
| 7 |
| 2 |
| 5 |
| 3 |
| 5 |
=
| 2 |
| 7 |
=
| 2 |
| 7 |
(4)11-
| 3 |
| 11 |
| 7 |
| 11 |
| 1 |
| 11 |
=11-(
| 3 |
| 11 |
| 7 |
| 11 |
| 1 |
| 11 |
=11-1,
=10.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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