SUBTRACTION
What is 25-5=?
5
What is 20x10=?
200
14
10
214
200
5+2=2+5
COMMUTATIVE
50-40=?
10
What is 11X5=?
55
28
30
520
500
(7+2)+3=7+(2+3)
ASSOCIATIVE
100-50=?
50
What is 12X10=?
120
63
60
410
400
5+0=5
IDENTITY
80-40=?
40
What is 6X4=?
24
189
190
850
900
52,546+0=52,546
IDENTITY
1,000-500=?
500
What is 6X7=?
42
158
160
963
1,000
789+987=987+789
COMMUTATIVE