why don't i have to do any computing to solve 15 times 0 times (13+7)

When you multiply by zero, the answer is always zero.

because its even

To understand why you don't have to do any computing to solve 15 times 0 times (13+7), let's break it down step by step:

1. When multiplying any number by zero, the result is always zero. This is known as the multiplication property of zero. So, the first part of the equation, 15 times 0, will always be zero.

2. Next, we have (13+7) in parentheses. Inside the parentheses, we have a simple addition operation. 13+7 equals 20.

3. Finally, we have zero times 20. Any number multiplied by zero will always be zero, as mentioned earlier. So, zero times 20 is also equal to zero.

Therefore, by applying the multiplication property of zero, we can determine that the result of 15 times 0 times (13+7) is simply zero without any actual computation.