Finding distance between two points runs on subtraction and counting steps along a line. Warm up subtracting whole numbers and counting gaps on a number line, and distance on the grid becomes "just subtract."
Answer these 3, then press Show my path. No grade — this just points you to the right level.
1. What is 9 − 4?
2. How many steps from 2 to 7 on a number line?
3. To find the distance between 3 and 8, you can ___.
The distance between two points on a line is how many steps apart they are. When they line up across or up, you subtract the smaller number from the bigger one.
Your quick check picks one for you, but you can switch any time:
Level 0 Subtract one step at a time.
A. What is 5 − 2?
Count back from 5: 4, 3.
B. What is 7 − 3?
7 − 3 = 4.
C. How many steps from 0 to 6?
6 − 0 = 6.
Level 1 Count the gap between two numbers.
A. How many steps from 2 to 9?
9 − 2 = 7.
B. Two points sit at x = 1 and x = 5. How far apart are they?
5 − 1 = 4.
Level 2 Stretch into distance on a grid.
A. Points (3, 2) and (8, 2) are in the same row. How far apart are they?
Same y, so subtract the x-values: 8 − 3 = 5.
B. Points (4, 1) and (4, 6) are in the same column. How far apart are they?
Same x, so subtract the y-values: 6 − 1 = 5.
1. How many steps from 3 to 10?
10 − 3 = 7.
2. Points (2, 5) and (9, 5) are in the same row. How far apart are they?
Same y, subtract x-values: 9 − 2 = 7.
You've practiced exactly what Lesson 9-6 uses. Time to dive in.
Start Lesson 9-6 →