Model and apply the associative property of multiplication to aid mental computation, eg 2 x 3 x 5 = 2 x 5 x 3 = 10 x 3 = 30

1. Number Detectives: 2x3x?=24
2. Number Detectives: 5x6x?=90
3. Number production: Put the correct ending on each multiplication sentence
4. Number production: Put the correct ending on each multiplication sentence