How Much Longer?

Compare two lengths and find the difference.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 42

Which is longer, the snake or the caterpillar? Line them both up at 0 to compare.
The snake is 9 inches. The caterpillar is 4 inches. How much longer is the snake? Look at the part that sticks out.
9 minus 4 is 5. Or count up from 4 to 9: that's 5. The snake is 5 inches longer!
That also means the caterpillar is 5 inches shorter than the snake.
A parakeet is 15 inches long. A smaller bird is 7 inches long. The parakeet is 15 minus 7, or 8 inches longer!

Georgia's K-12 Mathematics Standards:

2.MDR.5.3 — Measure to determine how much longer one object is than another and express the length difference in terms of a standard-length unit.