Maths Prove It

Maths prove it

WALT...... Generalise properties of multiplication and division with whole numbers.
Here is a problem.

7 + 4 = 4 + 7

Associative  Commutative  Identity 

I think the answer is commutative.

The correct answer is commutative.

Fill in the missing numbers that makes this number sentence true.

( + 509) + 555 = 345 + ( + 555)

This is associative. CORRECT!!!!!

Lets do one more.

Which equation shows the identity property of addition?

5+1 (1+6) = (5+1) +6 | 4+3 = 3+4 | 9+0=9

I think that the answer is 9+0=9.

The correct answer is 9+0=9.