题目内容
| 能简便运算的简便运算. 1100-63.58-36.42 | 1.25×26×8 |
| ||||||||||||||
| 58×0.65+42×35% |
| (
|
考点:分数的四则混合运算,整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)根据减法的性质进行简算;
(2)根据乘法交换律进行简算;
(3)根据乘法分配律进行简算;
(4)先算乘法,再算加法;
(5)根据加法交换律和结合律进行简算;
(6)根据乘法分配律以及加法结合律进行简算.
(2)根据乘法交换律进行简算;
(3)根据乘法分配律进行简算;
(4)先算乘法,再算加法;
(5)根据加法交换律和结合律进行简算;
(6)根据乘法分配律以及加法结合律进行简算.
解答:
解:(1)1100-63.58-36.42
=1100-(63.58+36.42)
=1100-100
=1000;
(2)1.25×26×8
=1.25×8×26
=10×26
=260;
(3)
÷
-
×6
=
×6-
×6
=(
-
)×6
=
×6
=
;
(4)58×0.65+42×35%
=37.7+14.7
=52.4;
(5)
-
+
-
=(
+
)-(
+
)
=1-1
=0;
(6)(
+
)×8+
=
×8+
×8+
=
+
+
=
+(
+
)
=
+1
=2
.
=1100-(63.58+36.42)
=1100-100
=1000;
(2)1.25×26×8
=1.25×8×26
=10×26
=260;
(3)
| 8 |
| 15 |
| 1 |
| 6 |
| 7 |
| 15 |
=
| 8 |
| 15 |
| 7 |
| 15 |
=(
| 8 |
| 15 |
| 7 |
| 15 |
=
| 1 |
| 15 |
=
| 2 |
| 5 |
(4)58×0.65+42×35%
=37.7+14.7
=52.4;
(5)
| 8 |
| 11 |
| 9 |
| 14 |
| 3 |
| 11 |
| 5 |
| 14 |
=(
| 8 |
| 11 |
| 3 |
| 11 |
| 9 |
| 14 |
| 5 |
| 14 |
=1-1
=0;
(6)(
| 3 |
| 16 |
| 1 |
| 24 |
| 2 |
| 3 |
=
| 3 |
| 16 |
| 1 |
| 24 |
| 2 |
| 3 |
=
| 3 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 3 |
| 2 |
| 1 |
| 3 |
| 2 |
| 3 |
=
| 3 |
| 2 |
=2
| 1 |
| 2 |
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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