Mathematics
Senior High
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合っていますか?
問4
3桁の自然数のうち, 各位の数字の和が4になる数は何個あるか
0 - 3
2
2
0- 2
2
1-1
TISO
2 - 0
0-1
3く
1- 0
4-0-0
9 通り
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