[其他] 國小數學!?
我朋友分享他念國小的小孩的回家功課
1到19不能重複,填寫至以下16個框框中
[ ] + [ ] + [ ] = [ ]
[ ] - [ ] - [ ] = [ ]
[ ] + [ ] + [ ] = [ ]
[ ] - [ ] - [ ] = [ ]
是我想得太複雜嗎..解不出來說= =
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