题目内容
51
÷
+71
÷
+91
÷
.
| 2 |
| 3 |
| 5 |
| 3 |
| 3 |
| 4 |
| 7 |
| 4 |
| 4 |
| 5 |
| 9 |
| 5 |
51
÷
+71
÷
+91
÷
=(50+
)×
+(70+
)×
+(90+
)×
=50×
+
×
+70×
+
×
+90×
+
×
=30+1+40+1+50+1
=123.
| 2 |
| 3 |
| 5 |
| 3 |
| 3 |
| 4 |
| 7 |
| 4 |
| 4 |
| 5 |
| 9 |
| 5 |
=(50+
| 5 |
| 3 |
| 3 |
| 5 |
| 7 |
| 4 |
| 4 |
| 7 |
| 9 |
| 5 |
| 5 |
| 9 |
=50×
| 3 |
| 5 |
| 5 |
| 3 |
| 3 |
| 5 |
| 4 |
| 7 |
| 7 |
| 4 |
| 4 |
| 7 |
| 5 |
| 9 |
| 9 |
| 5 |
| 5 |
| 9 |
=30+1+40+1+50+1
=123.
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