题目内容
计算下面各题(能简算的要简算).
(1)36÷(
-
)×3
(2)(
-
×
)÷
(3)
+(
-
)-
(4)36×(
+
-
)
(5)
÷[(
+
)×
]
(6)25×
+
×75.
(1)36÷(
| 5 |
| 6 |
| 1 |
| 3 |
(2)(
| 4 |
| 5 |
| 8 |
| 15 |
| 1 |
| 2 |
| 3 |
| 5 |
(3)
| 3 |
| 11 |
| 8 |
| 11 |
| 1 |
| 12 |
| 11 |
| 12 |
(4)36×(
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 6 |
(5)
| 1 |
| 5 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
(6)25×
| 2 |
| 5 |
| 2 |
| 5 |
考点:整数、分数、小数、百分数四则混合运算,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)先算减法,再算除法,最后算乘法;
(2)先算乘法,再算减法,最后算除法;
(3)根据加法交换律和结合律进行简算;
(4)根据乘法分配律进行简算;
(5)先算加法,再算乘法,最后算除法;
(6)根据乘法分配律进行简算.
(2)先算乘法,再算减法,最后算除法;
(3)根据加法交换律和结合律进行简算;
(4)根据乘法分配律进行简算;
(5)先算加法,再算乘法,最后算除法;
(6)根据乘法分配律进行简算.
解答:
解:(1)36÷(
-
)×3
=36÷
×3
=72×3
=216;
(2)(
-
×
)÷
=(
-
)÷
=
÷
=
;
(3)
+(
-
)-
=(
+
)-(
+
)
=1-1
=0;
(4)36×(
+
-
)
=36×
+36×
-36×
=9+15-6
=24-6
=18;
(5)
÷[(
+
)×
]
=
÷[
×
]
=
÷
=3;
(6)25×
+
×75
=(25+75)×
=100×
=40.
| 5 |
| 6 |
| 1 |
| 3 |
=36÷
| 1 |
| 2 |
=72×3
=216;
(2)(
| 4 |
| 5 |
| 8 |
| 15 |
| 1 |
| 2 |
| 3 |
| 5 |
=(
| 4 |
| 5 |
| 4 |
| 15 |
| 3 |
| 5 |
=
| 8 |
| 15 |
| 3 |
| 5 |
=
| 8 |
| 9 |
(3)
| 3 |
| 11 |
| 8 |
| 11 |
| 1 |
| 12 |
| 11 |
| 12 |
=(
| 3 |
| 11 |
| 8 |
| 11 |
| 1 |
| 12 |
| 11 |
| 12 |
=1-1
=0;
(4)36×(
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 6 |
=36×
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 6 |
=9+15-6
=24-6
=18;
(5)
| 1 |
| 5 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
=
| 1 |
| 5 |
| 13 |
| 15 |
| 1 |
| 13 |
=
| 1 |
| 5 |
| 1 |
| 15 |
=3;
(6)25×
| 2 |
| 5 |
| 2 |
| 5 |
=(25+75)×
| 2 |
| 5 |
=100×
| 2 |
| 5 |
=40.
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