题目内容
脱式计算.
×(
-
)
+9×
÷
+
×
.
| 8 |
| 33 |
| 11 |
| 6 |
| 3 |
| 8 |
| 4 |
| 5 |
| 5 |
| 6 |
| 3 |
| 5 |
| 7 |
| 4 |
| 2 |
| 5 |
| 4 |
| 7 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)根据乘法分配律进行简算;
(2)先算乘法,再算加法;
(3)根据乘法分配律进行简算.
(2)先算乘法,再算加法;
(3)根据乘法分配律进行简算.
解答:
解:(1)
×(
-
)
=
×
-
×
=
-
=
;
(2)
+9×
=
+7
=8
;
(3)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
.
| 8 |
| 33 |
| 11 |
| 6 |
| 3 |
| 8 |
=
| 8 |
| 33 |
| 11 |
| 6 |
| 8 |
| 33 |
| 3 |
| 8 |
=
| 4 |
| 9 |
| 1 |
| 11 |
=
| 35 |
| 99 |
(2)
| 4 |
| 5 |
| 5 |
| 6 |
=
| 4 |
| 5 |
| 1 |
| 2 |
=8
| 3 |
| 10 |
(3)
| 3 |
| 5 |
| 7 |
| 4 |
| 2 |
| 5 |
| 4 |
| 7 |
=
| 3 |
| 5 |
| 4 |
| 7 |
| 2 |
| 5 |
| 4 |
| 7 |
=(
| 3 |
| 5 |
| 2 |
| 5 |
| 4 |
| 7 |
=1×
| 4 |
| 7 |
=
| 4 |
| 7 |
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.
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