题目内容
计算
÷
-(
-
)×
×
+
×75%
467×99-533
(1.5-
)×(3-
)
| 4 |
| 9 |
| 2 |
| 3 |
| 3 |
| 5 |
| 1 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 2 |
| 9 |
| 7 |
| 9 |
467×99-533
(1.5-
| 2 |
| 3 |
| 9 |
| 5 |
考点:整数、分数、小数、百分数四则混合运算,整数四则混合运算,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)先算小括号里的减法,再算除法和乘法,最后算括号外面的减法.
(2)把75%写成
的形式,再运用乘法分配律进行解答.
(3)把99写成100-1的形式,再运用乘法分配律进行计算.
(4)先算小括号里面的减法,再算乘法.
(2)把75%写成
| 3 |
| 4 |
(3)把99写成100-1的形式,再运用乘法分配律进行计算.
(4)先算小括号里面的减法,再算乘法.
解答:
解:
(1)
÷
-(
-
)×
=
÷
-
×
=
×
-
×
=
-
=
(2)
×
+
×75%
=
×
+
×
=
×(
+
)
=1×
=
(3)467×99-533
=467×(100-1)-533
=46700-467-533
=46700-(467+533)
=46700-1000
=45700
(4)(1.5-
)×(3-
)
=(
-
)×(
-
)
=
×
=1
(1)
| 4 |
| 9 |
| 2 |
| 3 |
| 3 |
| 5 |
| 1 |
| 3 |
| 5 |
| 6 |
=
| 4 |
| 9 |
| 2 |
| 3 |
| 4 |
| 15 |
| 5 |
| 6 |
=
| 4 |
| 9 |
| 3 |
| 2 |
| 4 |
| 15 |
| 5 |
| 6 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 4 |
| 9 |
(2)
| 3 |
| 4 |
| 2 |
| 9 |
| 7 |
| 9 |
=
| 3 |
| 4 |
| 2 |
| 9 |
| 7 |
| 9 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 2 |
| 9 |
| 7 |
| 9 |
=1×
| 3 |
| 4 |
=
| 3 |
| 4 |
(3)467×99-533
=467×(100-1)-533
=46700-467-533
=46700-(467+533)
=46700-1000
=45700
(4)(1.5-
| 2 |
| 3 |
| 9 |
| 5 |
=(
| 9 |
| 6 |
| 4 |
| 6 |
| 15 |
| 5 |
| 9 |
| 5 |
=
| 5 |
| 6 |
| 6 |
| 5 |
=1
点评:本题考查的是四则混合运算的知识,能用简便算法的要用简便算法计算.
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