Here is the question: Find the exact value of the following expression: 6*22*5. Use any mental calculation technique you choose. Name the technique. Here is what my answer looks like: 6*22*5 (6*5)*2*11 (30*2)*11 60*11=660 I multiplied by simple numbers. Is this right. Could you please explain it to me?

Yes, this is correct.

Thanks.

Yes, your answer is correct. You used a mental calculation technique called simplifying the expression by grouping and then multiplying its components.

Here's a step-by-step explanation of how you arrived at the final answer of 660:

1. Start with the expression 6 * 22 * 5.

2. Since multiplication is associative, we can group the factors in any order without changing the result. In this case, you grouped 6 and 5 together: (6 * 5) * 22.

3. By multiplying 6 and 5, you get 30: 30 * 22 = 660.

Therefore, the exact value of the expression 6 * 22 * 5 is indeed 660, and you used the mental calculation technique of simplifying the expression by grouping and then multiplying the components.