### Video Transcript

Which of the following models
represents 19?

We’re shown four different models,
and each model represents a number. We’re looking for the model which
shows the number 19. Let’s look at the first model. There are two ten frames, and each
ten frame is full of counters. Which number does 10 and 10
make? 10 and 10 is 20. This model represents the number
20. This is not the one we’re looking
for. We’re looking for the model that
represents the number 19. Let’s look at our second model. The first ten frame is full; it has
10 counters. And the second ten frame has
eight. 10 and eight makes the number
18. This is not the model we’re looking
for either.

Let’s try the third model. This model has a 10 and nine
more. What number does 10 and nine
make? 10 and nine is 19. So this is the model which
represents the number 19. 10 and nine more is 19. The final model represents the
number 17 because 10 and seven more is 17. We found the model which represents
the number 19. 10 and nine more is 19.