Answer:
|
Number of counters on shape 1 |
Number of counters on shape 2 |
|
0 |
5 |
|
1 |
4 |
|
2 |
3 |
|
3 |
2 |
|
4 |
1 |
|
5 |
0 |
TEACHER NOTES:
Opportunities to explore the commutative property of addition will often arise
when students are allowed to use their own strategies for adding several
two-digit numbers. (When they have three or more numbers, they will also use the
associative property of addition.)