Year 4 bk 1 – 1.5 The number before or the number after

Enter the  number one before 5431.

Enter the  number one before 4370.

Enter the  number one before 1009.

Enter the  number one before 4000.

Enter the  number one before 4710.

Enter the  number one before 5589.

Enter the  number one before 8500.

Enter the  number one after 6589.

Enter the  number one after 5099.

Enter the  number one after 6789.

Enter the  number one after 7009.

Enter the  number one after 1678.

Enter the  number one after 6679.

Enter the  number one after 1019.

Enter the  number one after 57809.