题目内容
计算,能简算的请用简便方法计算.
24×896÷64
129×0.125-49÷8
-0.37+
-0.63
÷
+
×
[
-(
-
)]÷
.
24×896÷64
129×0.125-49÷8
| 5 |
| 9 |
| 7 |
| 9 |
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
考点:分数的四则混合运算,整数四则混合运算,分数的简便计算,小数四则混合运算
专题:运算顺序及法则,运算定律及简算
分析:(1)按照从左向右的顺序进行计算;
(2)根据乘法分配律进行简算;
(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)先算小括号里面的减法,再算中括号里面的减法,最后算除法.
(2)根据乘法分配律进行简算;
(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)先算小括号里面的减法,再算中括号里面的减法,最后算除法.
解答:
解:(1)24×896÷64
=21504÷64
=336;
(2)129×0.125-49÷8
=129×0.125-49×0.125
=(129-49)×0.125
=80×0.125
=10;
(3)
-0.37+
-0.63
=(
+
)-(0.37+0.63)
=
-1
=
;
(4)
÷
+
×
=
×
+
×
=(
+
)×
=1×
=
;
(5)[
-(
-
)]÷
=[
-
]÷
=
÷
=
.
=21504÷64
=336;
(2)129×0.125-49÷8
=129×0.125-49×0.125
=(129-49)×0.125
=80×0.125
=10;
(3)
| 5 |
| 9 |
| 7 |
| 9 |
=(
| 5 |
| 9 |
| 7 |
| 9 |
=
| 4 |
| 3 |
=
| 1 |
| 3 |
(4)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=
| 7 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(5)[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 10 |
=
| 7 |
| 20 |
| 7 |
| 10 |
=
| 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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