题目内容
|
6-(
|
| ||||||||||||||||
36×(
|
|
23-
|
分析:(1)先同时算出两个除法,再算加法,
(2)先算小括号里的除法,再算小括号里的加法,最后算括号外的减法,
(3)把除以
化成乘以88,再运用乘法的分配律进行简算,
(4)运用乘法的分配律进行简算,
(5)运用乘法的分配律进行简算,
(6)先算乘法,再算除法,最后算减法.
(2)先算小括号里的除法,再算小括号里的加法,最后算括号外的减法,
(3)把除以
| 1 |
| 88 |
(4)运用乘法的分配律进行简算,
(5)运用乘法的分配律进行简算,
(6)先算乘法,再算除法,最后算减法.
解答:解:(1)
÷7+7÷
,
=
+49,
=49
;
(2)6-(
÷2+3),
=6-(
+3),
=6-3
,
=2
;
(3)
×88+
÷
,
=
×88+
×88,
=(
+
)×88,
=1×88,
=88;
(4)36×(
+
+
),
=36×
+36×
+36×
,
=9+6+4,
=15+4,
=19;
(5)
×7+
×11,
=
×(7+11),
=
×18,
=10;
(6)23-
×
÷
,
=23-
÷
,
=23-18,
=5.
| 1 |
| 7 |
| 1 |
| 7 |
=
| 1 |
| 49 |
=49
| 1 |
| 49 |
(2)6-(
| 1 |
| 7 |
=6-(
| 1 |
| 14 |
=6-3
| 1 |
| 14 |
=2
| 13 |
| 14 |
(3)
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 88 |
=
| 3 |
| 4 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
=1×88,
=88;
(4)36×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 9 |
=36×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 9 |
=9+6+4,
=15+4,
=19;
(5)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
=10;
(6)23-
| 8 |
| 9 |
| 3 |
| 4 |
| 1 |
| 27 |
=23-
| 2 |
| 3 |
| 1 |
| 27 |
=23-18,
=5.
点评:此题考查了分数四则混合运算的顺序,要灵活运用运算定律进行简算.
练习册系列答案
相关题目