题目内容
看谁的方法简单.
×27+16×
[
×(
-0.25)+
]÷
(
+
)×29×23
0.65×6.4-6.5×0.54+65×9%
| 16 |
| 23 |
| 19 |
| 23 |
[
| 4 |
| 7 |
| 3 |
| 5 |
| 3 |
| 10 |
| 1 |
| 2 |
(
| 2 |
| 29 |
| 3 |
| 23 |
0.65×6.4-6.5×0.54+65×9%
考点: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)(3)(4)根据乘法的分配律简算;
(2)先算小括号里的减法,再算外面的乘法,再算中括号里的加法,最后算中括号外面的除法.
(2)先算小括号里的减法,再算外面的乘法,再算中括号里的加法,最后算中括号外面的除法.
解答:
解:(1)
×27+16×
=
×27+19×
=
×(27+19)
=
×46
=32
(2)[
×(
-0.25)+
]÷
=[
+
]÷
=
÷
=1
(3)(
+
)×29×23
=
×29×23+
×29×23
=46+87
=133
(4)0.65×6.4-6.5×0.54+65×9%
=0.65×6.4-0.65×5.4+0.65×9
=0.65×(6.4-5.4+9)
=0.65×10
=6.5
| 16 |
| 23 |
| 19 |
| 23 |
=
| 16 |
| 23 |
| 16 |
| 23 |
=
| 16 |
| 23 |
=
| 16 |
| 23 |
=32
(2)[
| 4 |
| 7 |
| 3 |
| 5 |
| 3 |
| 10 |
| 1 |
| 2 |
=[
| 1 |
| 5 |
| 3 |
| 10 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 1 |
| 2 |
=1
(3)(
| 2 |
| 29 |
| 3 |
| 23 |
=
| 2 |
| 29 |
| 3 |
| 23 |
=46+87
=133
(4)0.65×6.4-6.5×0.54+65×9%
=0.65×6.4-0.65×5.4+0.65×9
=0.65×(6.4-5.4+9)
=0.65×10
=6.5
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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