This printable bingo card set on the topic of Arithmetic & Numbers has 21 unique items on a 4x4 grid. Each card draws from a pool of 21 items, so every player gets a different card.
2x5=
3x8
2x6
1x7
5x3
2x7
4x6
7x3
3x4
3x2
20x1
10x2
4x2
1+16
17-4
25-7
4+9
2+1
4-2
15-8
3x5