Question

Sort the equations out according to the property they illustrate.
You have 12 cards in this activity.

-7 . 1 = -7
3 + (7+19) = (3+7)+19
8 . 7 . 6 = 8 7 6
99+0=99
2 (4 . 11) = 2 (4 . 11)
5-3-=3-5
1 (-99) = 99
0.4 + 2.3 = 2.3 + 0.4

which of these are not a property, commutive, identity, and associative

Answer 1

What about 5-3=3-5 and 1 (-99) = 99