The product of any number and one is that number. For example 5 x 1 = 5.
Question 10
10.
When two numbers are added together, the sum is the same regardless of the order of the addends. For example a + b = b + a.
Question 11
11.
Adding 0 to any number leaves it unchanged. For example a + 0 = a.
Question 12
12.
When three or more numbers are multiplied, the product is the same regardless of the groupings of the multiplicands. For example (2 x 3) x 4 = 2 x (3 x 4)