题目内容
小明在计算
×(
+
)时,算成了
×
+
,得到一个错误的答案为
,比正确的答案多
,A= B= C= ,(A、B、C)都是整数.
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| 3 |
| 1 |
| 12 |
考点:用字母表示数
专题:用字母表示数
分析:
×(
+
)=
×
+
×
,用
×
+
减去
×
+
×
即可计算出多出的数,进而逐步推导出A和C的值,再代入任意一个算式解出B值即可.
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| A |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| A |
| 1 |
| C |
解答:
解:
×
+
-
×(
+
)
=
×
+
-(
×
+
×
)
=
-
×
=
=
,
所以A-1=1,A=2,C=12×2=6,
则
×
+
=
×
+
=
,
则
=(
-
)÷
=
÷
=
,
所以B=3.
故答案为:2;3;6.
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
=
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
| 1 |
| A |
| 1 |
| B |
| 1 |
| A |
| 1 |
| C |
=
| 1 |
| C |
| 1 |
| A |
| 1 |
| C |
=
| A-1 |
| AC |
=
| 1 |
| 12 |
所以A-1=1,A=2,C=12×2=6,
则
| 1 |
| A |
| 1 |
| B |
| 1 |
| C |
=
| 1 |
| 2 |
| 1 |
| B |
| 1 |
| 6 |
=
| 1 |
| 3 |
则
| 1 |
| B |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 1 |
| 2 |
=
| 1 |
| 3 |
所以B=3.
故答案为:2;3;6.
点评:解决本题关键是借助两个算式的差求出A、C的值.
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