math-crossword/addition-4x4/hard · 套题 1
8 problems
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班级:
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1
__ × 4 12
=
2
26 + 21 __
=
3
37 - 13 __
=
4
3 × 7 __
=
5
29 - __ 19
=
6
9 + __ 20
=
7
__ + 12 13
=
8
__ + 29 39
=