What is the radius of the circle 10 cm?

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.