题目内容
| 计算题(能简则简) 12÷(
|
(
| ||||||||||
|
|
分析:(1)先算减法,再算除法;
(2)根据乘法分配律以及减法的性质进行简算;
(3)根据乘法分配律进行简算;
(4)48=47+1,然后再根据乘法分配律进行简算.
(2)根据乘法分配律以及减法的性质进行简算;
(3)根据乘法分配律进行简算;
(4)48=47+1,然后再根据乘法分配律进行简算.
解答:解:
(1)12÷(
-
),
=12÷
,
=144;
(2)(
-
)×7-27÷34,
=
×7-
×7-
,
=3-
-
,
=3-(
+
),
=3-1,
=2;
(3)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(4)
×48,
=
×(47+1),
=
×47+
×1,
=26+
,
=26
.
(1)12÷(
| 1 |
| 4 |
| 1 |
| 6 |
=12÷
| 1 |
| 12 |
=144;
(2)(
| 3 |
| 7 |
| 1 |
| 34 |
=
| 3 |
| 7 |
| 1 |
| 34 |
| 27 |
| 34 |
=3-
| 7 |
| 34 |
| 27 |
| 34 |
=3-(
| 7 |
| 34 |
| 27 |
| 34 |
=3-1,
=2;
(3)
| 7 |
| 8 |
| 5 |
| 16 |
| 1 |
| 8 |
| 16 |
| 7 |
=
| 5 |
| 8 |
| 7 |
| 16 |
| 1 |
| 8 |
| 7 |
| 16 |
=(
| 5 |
| 8 |
| 1 |
| 8 |
| 7 |
| 16 |
=
| 3 |
| 4 |
| 7 |
| 16 |
=
| 21 |
| 64 |
(4)
| 26 |
| 47 |
=
| 26 |
| 47 |
=
| 26 |
| 47 |
| 26 |
| 47 |
=26+
| 26 |
| 47 |
=26
| 26 |
| 47 |
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