Find the Rule

Spot and continue number patterns like +10, −100, +25.

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

What children learn in Level 19

In a pattern, the same change happens over and over. Look: 120, 130, 140, 150. What's changing?
Each number is 10 more than the one before. The rule is: add 10!
Here's a shrinking pattern: 850, 750, 650, 550. Each number is 100 less. The rule is: take away 100.
To find a rule, compare two numbers next to each other. Then check that the rule works for all of them!
You can make your own pattern, too. Start at 205 and add 100 each time: 205, 305, 405, 505!

Georgia's K-12 Mathematics Standards:

2.PAR.4.1 — Identify, describe, and create a numerical pattern resulting from repeating an operation such as addition and subtraction.