Explain how to use mental math to simplify the expression.
6 • 3 • 5
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In my opinion, each person needs to figure his or her own way of doing mental math.
How do you do mental math?
To simplify the expression 6 • 3 • 5 using mental math, we can take advantage of the associative property of multiplication. The associative property tells us that the grouping of numbers being multiplied does not affect the result. In other words, we can choose to multiply any two numbers first and then multiply the result by the third number.
In this case, let's choose to multiply the first two numbers, 6 and 3, first.
6 • 3 is equal to 18.
Now, we can multiply the result (18) by the third number, 5.
18 • 5 is equal to 90.
Therefore, the simplified expression is 90.
Using mental math, we simplified the expression by multiplying 6 and 3 together to get 18, and then multiplying the result by 5 to get 90.