Video Transcript
How many nines are there in 108?
This question is asking us to do some grouping. It wants to know how many groups of nine are there in 108. And that process is the same as dividing 108 by nine. We take the number we’re given — 108 — and we divide it by nine. Almost immediately, we recognize that nine cannot be divided into one. But nine can be divided into 10. How many times will nine go into 10? One time. Nine will go into 10 one time.
We multiply one times nine which equals nine and then we subtract. 10 minus nine equals one. Bring down the next value to the right which is an eight and then ask the question how many times will nine go into 18? How many groups of nine are in 18? Two. There are two groups of nine in 18. Two times nine equals 18. 18 minus 18 equals zero. Nine divides into 108 12 times evenly with no remainder.
This tells us that there are 12 groups of nine in 108. As this question has asked how many nines are there in 108? We answer that question with 12.
