Carlos can write 3 to 4 pages in his journal in 3/4 hour. If he writes for 5 hours, what's a reasonable number of pages he can write in that time? A) between 10 and 15
B) between 15 and 20
C) between 20 and 25
D) between 25 and 30

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.