题目内容
能简算的要简算.
|
|
|
24×(
|
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)按照从左向右的顺序进行计算;
(3)按照从左向右的顺序进行计算;
(4)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)按照从左向右的顺序进行计算;
(4)根据乘法分配律进行简算.
解答:
解:(1)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
;
(2)
×
÷
=
÷
=
;
(3)
÷
÷
=
÷
=
;
(4)24×(
-
+
)
=24×
-24×
+24×
=9-4+10
=5+10
=15.
| 3 |
| 7 |
| 7 |
| 11 |
| 4 |
| 7 |
| 11 |
| 7 |
=
| 3 |
| 7 |
| 11 |
| 7 |
| 4 |
| 7 |
| 11 |
| 7 |
=(
| 3 |
| 7 |
| 4 |
| 7 |
| 11 |
| 7 |
=1×
| 11 |
| 7 |
=
| 11 |
| 7 |
(2)
| 11 |
| 12 |
| 9 |
| 46 |
| 22 |
| 23 |
=
| 33 |
| 184 |
| 22 |
| 23 |
=
| 3 |
| 16 |
(3)
| 7 |
| 4 |
| 9 |
| 4 |
| 7 |
| 15 |
=
| 7 |
| 9 |
| 7 |
| 15 |
=
| 5 |
| 3 |
(4)24×(
| 3 |
| 8 |
| 1 |
| 6 |
| 5 |
| 12 |
=24×
| 3 |
| 8 |
| 1 |
| 6 |
| 5 |
| 12 |
=9-4+10
=5+10
=15.
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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