Arithmetic Properties

Which property is represented?
3 + (15 + 4) = (3 + 15) + 4

Which property is represented?

$$6\cdot(4\cdot r)=(6\cdot4)\cdot r$$

Which property is represented?
44 + 99 = 99 + 44

an expression of the form A(B+C) can be solved as

A(B+C)=AB+BC. Which property is represented?

Which equation shows the Additive Inverse (negation) of a Number?

Which equation shows the Zero Property of Multiplication?

Which property is this an example of?
9 x 1 = 9

Which is an example of Identity Property of Addition?

Compute $$1\cdot100\cdot2\cdot50\cdot4\cdot25\cdot5\cdot20$$

(a)  

Compute 278 + 1475 + 6279 + (-178) + (-1375) + (-6179)

(a)