The fourth grade elementary school mathematics matching exercise book has 34 pages of answers.
1, 78 contains at most (2) 30. There are at most (4) 20s out of 2,96. There are at most (8) 40s in 3324. ; There are at most (6) 70s in 4472. 5832 has at most (10) 80. 6734 has at most (8) 90s.