题目内容
用你喜欢的方法计算.
×
+
÷
÷(
+
×
)
3÷11÷[
+(1-
)].
| 4 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 8 |
| 3 |
| 8 |
| 8 |
| 5 |
3÷11÷[
| 2 |
| 5 |
| 10 |
| 11 |
考点:分数的四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)根据乘法分配律进行简算;
(2)先算乘法,再算加法,最后算除法;
(3)先算减法,再算加法,再按照从左向右的顺序进行计算.
(2)先算乘法,再算加法,最后算除法;
(3)先算减法,再算加法,再按照从左向右的顺序进行计算.
解答:
解:(1)
×
+
÷
=
×
+
×
=
×(
+
)
=
×1
=
;
(2)
÷(
+
×
)
=
÷(
+
)
=
÷
=
;
(3)3÷11÷[
+(1-
)]
=3÷11÷[
+
]
=3÷11÷
=
÷
=
.
| 4 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
| 3 |
| 4 |
=
| 4 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
| 4 |
| 3 |
=
| 4 |
| 3 |
| 2 |
| 7 |
| 5 |
| 7 |
=
| 4 |
| 3 |
=
| 4 |
| 3 |
(2)
| 1 |
| 4 |
| 5 |
| 8 |
| 3 |
| 8 |
| 8 |
| 5 |
=
| 1 |
| 4 |
| 5 |
| 8 |
| 3 |
| 5 |
=
| 1 |
| 4 |
| 49 |
| 40 |
=
| 10 |
| 49 |
(3)3÷11÷[
| 2 |
| 5 |
| 10 |
| 11 |
=3÷11÷[
| 2 |
| 5 |
| 1 |
| 11 |
=3÷11÷
| 27 |
| 55 |
=
| 3 |
| 11 |
| 27 |
| 55 |
=
| 5 |
| 9 |
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定律简便计算.
练习册系列答案
相关题目