|
The orange rods equal 10/10 or 1 whole, the blue rods equal 9/10, and the brown rods equal 8/10, etc. |
Here a student uses an orange rod (1whole) and a blue rod (9/10) to show 10/10 + 9/10=19/10 or 1 9/10. |
Here a student uses 2 orange rods (2wholes) and a lime rod (3/10) to show 20/10 + 3/10=23/10 or 2 3/10. |
