2
0Keywords:
addition
identity
inverse
multiplication
properties of one
properties of zero
Students show their understanding of the properties of zero and one, by filling in the missing numbers or signs (+ or ×) in a range of equations.
0
0
4
2
3
2
2
0
2
1
0
1
2
1
2
4
3
3
1
2
1
1
1
2
2
