Describe how to find the sum p+q using a number line if p=−19 and q=12.1.
To find the sum p+q using a number line, start at the number -19 on the number line. Move to the right by 19 units to reach 0. Then, move further to the right by 12.1 units to arrive at the final sum.
Since p=-19, you would start at -19 on the number line.
To add 19, move to the right by 19 units from -19. This would bring you to 0.
Then, to add 12.1, move to the right again by 12.1 units from 0. This would bring you to the final sum.
So, on the number line, you would move from -19 to 0, and then from 0 to 12.1.
To find the sum of p+q using a number line, follow these steps:
1. Draw a number line with a positive and negative direction.
2. Start at zero on the number line.
3. Move 19 units to the left (in the negative direction) to represent the value of p = -19.
4. Now, starting from the new position, move 12.1 units to the right (in the positive direction) to represent the value of q = 12.1.
5. The position on the number line where you end up represents the sum of p+q.
6. Count the units from zero to the final position to find the sum.
In this case, p = -19. So, move 19 units to the left. Then, q = 12.1, so move 12.1 units to the right from the position you reached after step 3. The sum of -19 and 12.1 is the position on the number line where you ended up. Count the units from zero to that position to get the sum.